But it's only disguisting to you because you haven't been created for this world.
What if someone were to have reduced the oxygen to your embryo so that you were an idiot and were happy but had no idea what I was talking about? That's ok to you?
BNW was not meant to be a template for a future society. It's a story to get the reader to try to adjust to the norm of morally reprehensible behavior and then at the end smack them back to cold, hard reality.
You mean kinda like how they put lead in the water in Flint, Michigan?