Men have lower testosterone levels than their grandfathers, there are many possible causes but the treatment I'm talking about only really brings you to a bit above where grandpa would've been.
Because you've never met an athlete, I guess. None of them would stop at "mild".
The goal isn't to get them to a superhuman level, just to level the best genetics produce.
Some sports ban certain techniques to protect athletes, just some examples: * Backflip in figure skating * Sommersault in longjump * Spinning javelin in javelin throw * Cartwheel in shot put
It's just that doping is only one way, so ignoring something like this which seems likely to cause lasting damage because 'destroying the body for sport is not unusual' is a bit weird when on the other hand athletes are subjected to incredibly invasive surveillance to avoid the temptation to use even the tiniest amount of substances.
I honestly believe that some forms of doping are less dangerous than professional sport per se. This isn't the fairest comparison but far fewer cyclists died of EPO than by trying to descend too quickly.