There is a hell of a lot more to it than simply "that is why you eat vegetables."
First of all Couture states it so you are foolish to argue. If you disagree check out "The Best of Mixed Martial Arts: The Extreme Handbook on Moves, Techniques, and the Smash-Mouth World of MMA" and read what Randy says for yourself. It is a gross misconception how much protein even top level MMA fighters need. Randy advocates greens supplements. Do you have any idea how many vegetables you would have to eat to get the same nutrition as a greens supplement?
Secondly, if you are consuming protein shakes with 60+ grams per shake multiple times a day, you (A) are wasting money as you can't absorb that much protein in one sitting anyway and (B) should go post on a powerlifting website because that is not how MMA athletes eat. Protein shakes with that much protein typically have a ton of calories, so that would have to be all that you eat otherwise you would never make weight. And if it is all you eat then you will have little energy to train. If you argue that you workout 5 times a day, I am going to laugh in your face and call you a liar.
So yeah, if you are a hardgainer powerlifter who doesn't mind gaining weight, by all means fill yourself up with tons of protein. Since Sherdog is an MMA site, I'm guessing most people want to talk about how fighters eat. When was the last time you saw a boxer or MMA fighter look like a round-belly powerlifter? Not often. So why the hell would you eat like one?
