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?
Cheaters battle each other all the time, deliberately, in private matches. The reason it’s not a sport with spectators is likely because if you’re a known cheater then you’re stuck with that label forever no matter what you do.