Did you not see the "let's get stupid" part? if you do want to criticize at least get my argument straight. There's no difference between farming animals and farming plants. You eventually kill them on purpose. We like to use sentience as the line we shouldn't cross, but that's almost arbitrary.

The sentience of other people doesn't stop us from doing horrible things to them, or allowing horrible things happen to them. And it's not that all people are monsters. At the end of the day we're monkeys with smartphones. And we only really care about other similar nearby monkeys. It's that simple.