Mark is not perfect, but he also doesn't say "omgah do everything I do." He has a vegetarian son and a pescatarian wife for god's sake. He obviously doesn't think primal is the one true way or else he would have taken his son's oatmeal away by now.
Additionally, Peat hasn't gained enough traction to start commercializing his ideas to the extent that Mark has. I bet he will do more things that you find offensive because it makes him money a few years down the road.
The point is, yes bulletproof coffee might be silly advice to a 16 year old, but that doesn't justify making the whole thread into an Identical thread war over fat vs carbs. I am blaming both sides for this. Chex isn't primal. End of story. Is it bad for health? Does it make one gain weight? Does it kill babies? OP does not care.