Found it, here's a good q and a with Bosworth on Stone Cold -
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He mentions really beating up Magee by accident during the film because they had to do lots of takes, and Magee wound up in the hospital. Also the original director was Bruce Malmuth, who did some of The Karate Kid films, Nighthawks, and Hard to Kill. Malmuth's kid is in the film too (biker Gut).
Everything everyone says in Hollywood is bullshit and lies, you can't accept any of that as true. They just do these interviews where they run off at the mouth trying to sound interesting.
Same with bodybuilding, maybe even worse these days because of youtube and social media.
That being said, Bosworth doesn't have to work another day in his life. That's a pretty good place to be. I remember seeing him in Gold's a lot in the early 90s, regular fixture there and in Marina area. Has the same lifestyle as those schmucks living the dream and sleeping in their cars in the parking lot, but he has the money to do it without working.