I love bodybuilding, even though I have swtiched to powerlifting, but I have to now FULLY agree: success as a monster physique competitor is mostly drugs and one's favourable reaction to them.
Sure, structural superiority is necessary (well, usually) to win high-level shows, but just to be a monstrous mountain of muscle? Drugs, drugs and more drugs ... and a willingness to get to the gym. What you do there is largely unimportant.