So what. We didn't start eating them until a few thousands years ago. The only reason to eat grains is that they are cheap. Better to save on other things.

No milk forever

Why? The previous book (GCBC) itself talks about how well Masais are, living basically on milk and blood, and it's an indictment of bad science research (cholesterol and sat fat paranoia) and a suggestion on where the problem or part of it could be (sugar and refined carbohydrates)