The "educate yourself" part was the big point. I blindly followed rules and routines without bothering to learn the principles behind them. If I had, I might have recognized them as BS. I'm not saying I never made progress, but I could have done far better.
The most successful bodybuilders, powerlifters, strongmen, etc. have been the smartest men in their sport, who didn't follow someone else's rules. They pushed the limits.
Case in point: "don't lift for more than 45 minutes, because your cortisol levels will spike and that's counterproductive." BULL! I've recently decided to test this concept by adding a set to each successive leg workout. Results: I'm up to 31 work sets (most to failure) in two hours, twice a week, and making my best progress ever. And my legs don't get sore.
Push the limits. Repeatedly. Ignore the "science" and pay attention to results. Tom Platz stretched his legs for an hour and a half before he worked them (big no-no). Then he worked them for over two hours (big no-no) using mainly squat variations (arguably a big no-no). Results: he's still known as Mr Legs.