I don't follow; why this?
because you will lose weight to fast and thus also lose muscle on only shakes and junk food.
I can't see how you can live only on protein shakes all day, maybe for a week or so. The point is, i think WL isn't even doing his diet in all the extremes he claims to do, i don't expect him to dine out every night and spend all his money on protein powder.
So, this means he cooks some meals, or his wife or gf or his mommy or whoever, and these people will listen to him when he says "no white rice tody for me" or "buy more lean meat when you go shopping honey" and so on.
I also don't limit myself to anything, but i'm far from claiming i would eat junk food ed.
I don't feel bad for covering most of my protein needs with shakes. Convenient as hell.
I don't want to go there again.