I think you are being a bit generous in assuming that a steroid ban in professional sports means that they are not used. In practice, it means that they must use them clandestinely, but I wouldn't be surprised if a future analysis reveals most of our top athletes of today are using PEDs. Additionally, highschool athletes are generally untested, meaning that highschool is their one opportunity to get ahead by whatever means necessary before attempting to carry that advantage forward with more conservative approaches in college and professional sports.