I mean, you’ll find people using PEDs in any sport, despite the risk of bans and everything. Steroid use is also rampant among bodybuilders.
There is an “obvious market”, but why do such sport leagues or federations that openly allow those drugs exist?
I can imagine that such a thing existing would create an immediate and widespread health problem with lots of people, athletes or not, using those performance enhancers and accidentally fucking themselves. But what else could be a problem?
PEDS aren’t limited to bulking up via steroids. A lot of PEDS use is about shortening recovery time. As an example, cycling is the kind of sport you’re describing where increased bulk is a disadvantage and doping in the sport has been absolutely endemic for years. It’s what the Lance Armstrong controversy was about and Armstrong was more representative of the norm at high levels than not.
I remember reading about Armstrong before he admitted to that, and he mentioned that he trains so that he has peak performance during the Tour de France. Then after the doping thing, I realized that’s what he was talking about.