「だけど成虫になったら、立派なカブトムシになるし、よく見りゃ幼虫だってかわいいもんだよ」
But if it reaches adulthood it will become a splendid rhinoceros beetle, and even ??? grubs are cute.
My guess is that よく見りゃ means 'good-looking' but I can't find it in any dictionary. Have I guessed correctly? Is it a contraction of something?