They probably contain toxins that can't be cooked away either. Ask yourself why humans refrained from eating them unless near starvation and death for the recorded history of humanity.
https://en.m.wikipedia.org/wiki/Entomophagy_in_humans
I'm going to say you probably haven't traveled much to be drawing such conclusions. Eating bugs is a big tourist shtick in Mexico for example. And you can go to markets with heaps of them on display.