Kind of a moot point because part of genetics, to me, is your response to drugs.
I've seen local gym rats put newbies on big test, tren and dbol cycles to blow up pinners. Some of them get a little jacked up and lose it when they come off, but I've seen some stay pretty large. I've also seen some just fucking explode and put all the rest of us to shame. They're just using the same drugs that everyone else is too.
But yeah, bodybuilding is all drugs. Anyone who thinks otherwise is a fucking tool.