That's just wrong. Plain and simple.
James, I am not saying, and hope no one else is saying, that size and strength don't matter. Of course it does. It matters a lot. Just like conditioning matters a lot when fighting at a high level. All else being equal the bigger and stronger man will win every time. The point being made is that if you want to be a fighter you have to train as a fighter. If you want to be big and strong then that is where you must focus your training. If you take two men and one trains solely as a fighter and another trains solely as a bodybuilder/powerlifter the fighter is going to win. Wolf, Dexter, Cutler don't have a prayer against Nog, Mir or even smaller guys like Penn, GSP and Gomi. Hell, I'll even throw in 40 years old 140 lb Royler Gracie in the mix. Just like those fighters would look ridiculous on stage in a thong.
Two different sports. I do think bodybuilding/power lifting compliments fighting, i.e., building your body will make you a better fighter. But I don't think it works the other way around. Being a better fighter will do nothing if your goal is to win bodybuilding shows or power lifting events.