I do see what you're saying but there's a crucial difference between sugar and meat. Sugar gives almost no marginal nutritional gain for a modern human. It can

I do see what you're saying but there's a crucial difference between sugar and meat. Sugar gives almost no marginal nutritional gain for a modern human. It can be substituted with something "empty" without thinking about it. If you do the same with meat, you have to get the nutrition from somewhere else. Also, meat is generally a healthy food source. In terms of protein per calorie, chicken breast and steak are up with with pure protein shakes.