I don’t know why he’s demonizing the food pyramid - honestly, how many people structure their diets according to its dictates in the first place?
It isn’t that many people follow the food pyramid. Instead, a lot of changes can be pinned to the thinking behind that pyramid. For example, McD’s fries used to by fried in lard — a healthy fat. Now, potatoes are fried in some kind of unhealthy “vegetable” oil. This was done, because the public perception was lard:bad vegetable oil:good, and they were pressured to make the switch.
This kind of thinking has resulted in the vast majority of calories consumed in the US being derived from soybean, wheat, and corn.