Well that's pretty baffling if true, considering that the guy in Hollywood who did have that look (Arnold) was about 100 times more successful than many other great actors that never followed suit because they didn't want to. Same with pro wrestlers, who you would expect to do anything to succeed vs. their peers in the looks department. You had Bruno Sammartino, Hulk Hogan, Paul Orndorff, and a handful of others with that look, while most looked like some guy. The guys I specifically mention made millions, main eventing pay per views, while many of these other guys got ignored and eventually forgotten by most (with some obvious exceptions). Today, you get guys like the Miz who can transform into Hogan-lite in a matter of months.
But again, I'm not just talking about steroids. You've got supplements, and the science of diet and nutrition (bolstered by uncounted millions of dollars pouring in from professional sports) that have facilitated research advances there.