In line with my point above that nature is irrelevant in a discussion about what's good or right, I'd like to point out that because of such unnatural practices

In line with my point above that nature is irrelevant in a discussion about what's good or right, I'd like to point out that because of such unnatural practices as cooking our food, it kind of doesn't matter what our teeth are adapted to eat. I don't want to eat whatever foods our savanna ancestor ate, because now we have farms and kitchens and supermarkets, and I have better options, and better criteria to guide my choice than some interpretation of what's 'natural'.