Because Haney used proper form and got out of the game YOUNG before his body started to be torn apart. Ronnie doesn't have that internal stop button and is paying the price. Also, how can you compare guys like Tiger Woods and Michael Jordan to what Mr. Olympias do? It's apples and oranges. Tiger Woods isn't physically breaking down his body and loading it full of copious amounts of drugs. He merely walked on a golf course on nice sunny days.
It's comparable because they were all at the pinnacle of their games! The best of the best and at that level all do what they have to do to get there yet Ronnie is the only one out of all those named who is a fucking cripple today!! By his own stupidity!!