TL;DR:
- Freedom of Speech is NOT an absolute
- Freedom of Speech is NOT an end in itself
- And freedom that is not universal is a mere privilege.
1. Freedom of Speech is NOT an absolute
You generally need to distinguish between the ability to do something and the "right" to do something and freedom of speech generally refers to the right rather than the ability. However "rights" do only make sense in the presence of and the relation to other people. In the absence of other people you could say anything and everything but as no one but yourself would hear it, it would be pointless.
So no the value and usefulness of speech intrinsically relies on being able to communicate with other entities. In other words it's not absolute, it's not outside of society, ever present, universal or whatnot. But it's on the contrary a very product of society and as such bound to the rules and regulations of that context.
Some simple examples of that might just be languages. Like you're not supposed to grunt and moan in public as you see fit, despite what we pretentiously call "language" might be barely more than moaning and grunting... Instead you're supposed to use words known to other people in that context.
Similarly different places and the social groups living their will make different experiences and communicate in different images, impressions, expressions, gestures and whatnot. One might pretentiously call that culture. Some parts of that are universal as humans are roughly equal compared to other animals, some parts will be unique to a time, space or social group.
So you're never "free" in your speech and expression, but you're always constraint by what your interlocutor is able to comprehend, accept or also how they interpret that. Otherwise you're just making random noise or have your noise be perceived as signals that you never intended to send in the first place.
For the most part "speech" is not an individual, but a social exercise and as such it's asinine to define it as an absolute individual right. You can technically do so, but it either lacks any meaning (absence of others), is quite useless (lack of understanding) or it becomes tyrannical (I'll come back to that later as that is bullet point 3).
2. Freedom of Speech is NOT an end in itself
For the most part you're already free to go in a cave, a forest, build yourself a sound proof room and scream into the void at full volume, for how long you like and whatever nonsense or sense comes to your mind.
Again that is not what people usually mean when they refer to free speech. Instead speech is again not a standalone feature that people care about, but they care about it in the context and in relation to a social group.
Yes that can include individual reception of noise, such as if your favorite part time is listening to Beethoven's 9th played on an orchestra of chain saws at 3 am in a densely populated city, which is really an acquired taste that takes some practice to appreciate the melody, while the rest will hear just noise... loud noise... obnoxiously loud noise... which contrary to the popular believe of some 17-19th century wise guys DOES actually do harm even if it doesn't, like idk sticks or stones, penetrate the skin or breaks bones...
But then again the thing that people object to isn't so much the individual pleasure, but the direct and indirect effect that it has on other people. And you're back again in the context of a society.
Were similarly to music or noise pollution, your moaning, grunting and scribbling aka "speech" is also rarely evaluated as a neutral thing, but rather interpreted by the effect it has on other the environment (particularly in the form of other people), the effect that you intent it to have or the effect that people think it might have or that you might have thought it would have...
So while apparently older generations thought of words having intrinsic power hence naming them swear or curse words akin to magical formulas that posses any intrinsic power on their own or just by reciting them (the rare exception being music where you're body might literally resonate with certain frequencies, but I guess people would consider that cheating (same as the chain saws) and would rather look at the "content" which could also be written and thus without direct physical effects). Usually the power of words isn't an intrinsic property of them, but the ability to trigger emotions within the recipient, which to be used deliberately would require social knowledge of the experiences and customs within a social group, as well as your own standing within the context of such a group. So the same words uttered by different people could trigger vastly different reactions. Classic example would be "I love you" which can trigger anything from deep joy to mortal fear, depending on whether it's said by your crush or a stalker.
So tl;dr it's usually not about the act of saying a word, but about the effect that it has on other people and oneself. Speech is just a tool not a goal.
The rebel/journalist isn't in anyway content, and thinks of having free speech, if the tyrant offers them a sound proof room and a typewrite directly feeding into a shredder as valve for their discomfort. The reason they want free speech is because they hope that by sharing their ideas they can pursue people to change the system (in their favor).
Also despite having said that words can very much hurt you, for example if they are loud enough, interrupt your regeneration process or trigger emotional reactions aso. The language of words, images and sounds is nonetheless less harmful and more constructive than for example other forms of communication like: violence. Yes that is a form of a very blunt form of communication where you communicate that you really want or don't want something or teach "empathy" by exemplifying quite vividly that something really hurts and how much it hurts.
Though "unfortunately" that is rarely interpreted in constructive ways and usually just ends up with an end of communication (death) or increasingly thorough questions of "do you really want THAT!", without ever actually answering the "question".
While more elaborate languages allow for the formulation of ideas, of formulas, of concepts, of mental images, of expressions of emotions that don't necessitate subjecting the other person directly to them, aso. So the idea is usually that if people are free and able to express themselves towards each other that dwarfs the necessity to express yourself more forcefully and violent.
It also usually came about in societal contexts which do value the perspective and freedom of the individual or which cherish information and knowledge and though if you give that space it would flourish and grow into something neat. Again there's a societal context and a purpose attached to it.
Though again if there is a purpose for it you can also investigate if the current state of the art serves that purpose. Like idk the necessity of free expression is the ability to exist and be able to express yourself in the first place. So taking aims at that for example negates the free speech of another person.
3. And freedom that is not universal is a mere privilege.
So sure if free speech is an absolute thing, then it stands outside of the context of the customs and regulations of mere mortals as a divine principle of thoughts... If it is an end in itself then, the end may justify certain means. Though as I tried to exemplify, free speech is hardly absolute (but a product of a society) and it's not an end in itself (but usually a means to achieve something else. Though a less forceful mean that for example violence which makes it more suitable for societies.)
So in other words you can ask what purpose it actually serve and you can ask whether the ends justify the means and whether the means even serve the ends in the first place.
And similar to most "freedoms", free speech has a fundamental intrinsic problem and that is that "freedom" occupies a weird space somewhere between the "freedom from" (from external pressure) and the "freedom to" (to as you like). And while there are domains where the two can coincide, if you'd increase the freedom to ad infinitum, it would inevitably manifest in the external pressure and thus the absence of freedom of other people. While similarly if you limit or even shrink the freedom to, that would likewise manifest itself as external pressure.
So both the person oppressed by a tyrant, as well as the tyrant itself, being restraint by principles of basic human decencies without which his followers would rebel, may yearn for "freedom".
So what does that freedom even mean and how can you obtain freedom without it being a mere privilege and subsequent revolutions always asking for freedom but never able to achieve anything beyond a never ending struggle for it?
Of course you can always take the conservative view of "freedom" is just a lack of discipline and people not doing it "the right way" and just solve the problem by not having freedom to begin with.
But that point of view "became" increasingly unpopular (not sure it ever was "popular", just because it was the ruling system to begin with), while freedom became something very popular as can be experienced by any individual and the most by those who have it the least, but even the most (relatively) unrestraint person might still have an appreciation of the idea of being free.
So if freedom is good how do we get more of it? Well you could either increase the freedom of one individual to unseen heights (but that would just be the previously held tyranny) or you could elevate every individual and give them more freedom that would be the concept of combining freedom with equality and making it a universal concept. The problem is that now everyone would be freer than they used to be but still bound without the context of the society of other people.
Though forming a society of free people deciding for and by themselves how much of their personal freedom they won't to give in exchange for receiving the vast benefits of cooperation that happen within society (yeah it's actually a net positive for almost everyone), is the closest people could get to having as much freedom as possible and being able to enjoy it without constant struggle and fear for your life.
So free speech is an integral part of that because the ability to participate in the decision making, the epistemic foundation of societal knowledge, the shaping of cultural colloquialisms, the ability to share goals, fears, aspirations, concerns, failures, successes and whatnot is integral to being free AND being part of society.
So free speech is vital for the function of a free society, but if it's purpose is to facilitate a pluralistic and free society, then you now also have a ruler in hand to see whether certain speech acts truly help or hamper that goal.
So for example lies, deceit, false accusations, defamation, libel, slander, threats, mis- and disinformation etc. which can very much be seen as counterproductive to that goal. If you push people outside of society or negate them their freedom, than you take a position of open antagonism and deprive them of their social relations and all the benefits that they would draw from them, to the point where this can be an existential threat (like how many people could live without society? ironically the poor might better than the rich... despite claims of "doing it all by themselves"). So these things can cause tension without society and depending on the severity for the individual or society can manifest themselves in violence, open conflict and the disruption of society.
So the preservation of society, as the necessity for the meaningfulness of free speech, as well as the free speech of other people, might as well end up trumping the intention of the individual to freely spew hateful bullshit.
That being said, while lies are problematic, you still got to be able to present ideas before they are fully functional. Like you could hardly do science without ever being wrong... or report about recent events without the fear of being proven wrong later on. So making predictions and speculations may occupy overlapping territory with lies and falsehoods, if not at the time of uttering then in the future.
So just because you identified certain things as problematic doesn't mean you can just easily solve them. It's a dance on razors edge between allowing as much freedom as possible to facilitate a free and open exchange of ideas, a mutual cooperation and a respect for the dignity of every individual, while denying the kind of speech that actively aims to undermine that.
Now that's easy when it comes to idk "Kill all the X", it becomes less easy when it's more subtle like accusations of crimes (might be true, might not be, protection of perpetrators vs protection of innocent people being wrongly accused) and just in general protecting the freedom of people from being dominated by others, while making sure that they themselves aren't dominating others.
So in a sense it still is that never ending struggle just that the means of struggling have become more sophisticated and the freedom of the individual might have been raised in some domains (as members of society), while in other domains it has been decreased by being a member of a society.
So TL;DR freedom is a very complex thing if you don't just see it as maximizing your own freedom at the expense of other people, in which case you violate their freedom...