I listened to this as an audiobook. It has some good points, but the author assumes that all sugar, salt and fat are the same. Why does the holy war not also f

I listened to this as an audiobook. It has some good points, but the author assumes that all sugar, salt and fat are the same. Why does the holy war not also fight against flour? Against corn? Should it not distinguish between "vegetable" oil, olive oil, butter, and coconut oil?