IMO this is a myth perpetuated by the pros... anyone who eats a decent diet and who can train very hard and can afford to take (and accept the life consequences of taking) enough PEDs can be a pro bodybuilder...
can they be Mr. O? Not necessarily... but a Pro? absolutely...
i've seen a lot of losers in my time waste tens of thousands on PEDs for a few years and get ridiculously huge...
then they shrink again like the pros when they are off
thats why i stay clean,,and put ,,diet enough to stay lean,eat enough at time to stay fuller,,no up and down bodyweight for me,,i have decent enough structure and shape to get by,,,i always admired zanes build and he did what he could with it i try to model my build in same likeness,,