Because these drugs have risks, and if they are allowed then every athlete has to take as much as possible or they won't be competitive. It's a classic "race to

Because these drugs have risks, and if they are allowed then every athlete has to take as much as possible or they won't be competitive. It's a classic "race to the bottom" scenario, where everybody would be better off without the drugs, but they're forced to expose themselves to avoidable heath risk because that's what everybody else is doing. There's a relevant SNL sketch: https://www.youtube.com/watch?v=jAdG-iTilWU https://www.youtube.com/watch?v=jAdG-iTilWU