Especially when money is involved and your sponsors are counting on you to perform for them to continue to make money off you (and vice versa). They don't really care if you cheat, either. They just don't want you to get caught.

I'm fairly sure a good majority of professional athletes have done or is doing something. Even if you take out the money and cheating reasoning, the schedule for most sports is brutal and using PEDs just to keep your body together is a thing. The french cyclist Jacques Anquetil said it best: "You'd have to be an imbecile or hypocrite to imagine that a professional cyclist who rides 235 days a year can hold himself together without stimulants"

You can also apply that to basketball, tennis, baseball, hockey, etc etc. We look at their 82 and 162 game schedules and sort of accept it as normal, but then when you think about it--playing all those games over the course of essentially 6 months is physically insane.