The drugs at play aren’t limited to androgens. For example in swimming many people have been busted for Methylhexaneamine, a performance enhancing stimulant.

Everyone is looking to shave off any time they can. Just taking drugs alone definitely isn’t enough to put you at the Olympic level. But if you have trained and trained relentlessly and have those sorts of passive genetic advantages you mentioned for your flavor of sport… that may not be enough to assure victory. You can expect your top opponents have similar advantages, since in a world of billions of people who are more mobile than they used to be you are likely not the only person with those particular in-born genetic advantages who trained a ton and has a good strategy… what can you do to get even the slightest edge?