All projects involve some sort of sacrifice, you might as well argue some people don't want to do all that hard work yet still compete in the top ranks. It is important to separate that they want to compete in the top ranks, and screwing up their bodies in the process. Wherein, screwing up their bodies in the process is a side effect of competing in the top ranks, just as spending all your time running and training is a sacrifice that's needed to compete in the top ranks now.
Except running and jumping and the like don't screw up your body in the same way that pumping it full of drugs does. You might be a bit worn out when you're older, sure, but your lifespan won't be significantly shortened.
Remember: noone will benefit from allowing drugs except the people who make the drugs, and all top level atheletes will experience a serious hit to their health.
Look, there are many dangerous sports that we don't object to even when they shorten their participant's lifespans. Combative sports for example, though it doesn't significantly shorten a person's life relative to heavy chemical therapy, the quality of life seriously diminishes after one too many hits to the head. Top rank racing is another one. There's a very real chance that there will be an accident on the track. Killing the drivers is not the real motive behind the sport, but neither is an Olympics where doping is allowed aiming to kill the participants either.
So we do our best to
minimize these risks. We make boxers wear gloves and have a referee to stop it if one of the fighters is taking too much damage. We put in stringent safety regulations in racing (heck, in most of the horrible F1 accidents you see the driver just walks out unscathed). We ban use of destructive drugs.
And regarding everyone using the drugs and evening the playing field shortening everyone's lives and generally not changing anything, I argue that it's already a part of Olympics already, extensive training isn't exactly ideal for a person in their lives, socializing and being with family is arguably far more valuable. People are already decreasing their standard of living to be able to compete on the top ranks.
Not really, because you can assume an athelete
enjoys training, competing and trying to be the best. I'm not sure you can say the same about pumping yourself full of drugs.
What we should focus on, is probably living standards, I think it's justified for a person to increase the quality of his/her life by doing what they want to do, even at the cost of shortening their life spans.
I think there is merit in the claim that people should have to break themselves to compete with each other, but this point is not consistent with the current levels of how much people allow others to train or practice even when they'd be doing other things instead to compete at the top level.
Living standards? Ok, how about we start by banning drugs that mess up your gender, can cause fits of rage and depression and other nasty side effects? I don't think there's any merit to that claim AT ALL. You shouldn't have to "break" yourself in order to participate in an otherwise completely safe sport.