You still need the genes for hypertrophy and asthetics. So they are "top specimens" in regard to what they do.
There are more genes for top specimens in bbing than real pro athletes like a Michael Phelps or a usain Bolt
Those two guys also have the physiques
It’s just that the majority of the population don’t aspire to inject copious amounts of drugs
They rather aspire to be a Messi or Ronaldo and yet, how many make it
Real sports and athletes more people participate and not many make it
Around 1600 pro players in the NFL today