Funny with HIT guys is that they go on and on about how high volume and frequency is so destructive, but brief sessions of stubbornly adding the lbs every workout till you pass out, puke, or lay twitching on the floor is somehow joint friendly and beneficial.
The methods of training run the entire spectrum of conflicting ideologies, and you have self made pros from all of them. What they all share is the genes, drug use, and passion for it. That's what it boils down to.