Then you're not going to be able to compete. Basically all professional sports require someone to push themselves beyond regular human limits, and give up future health to get there even without drugs.
I don't think non-contact sports require someone to sacrifice health, except for wearing out their body...
And I'm not convinced they wear out their body more than manual laborers.
And there is definitely a qualitative difference between a 16 year old working hard as a teenager to make it as a professional athlete, and perhaps wearing out their body by the end of their career as a professional athlete (say, 30 years old on average), compared to a 16 year old using substances that would count as "doping" to most people.
To put it plainly:
A 16 year old boy who shows promise as a professional athlete can work hard, realize that they're not cut out for the big leagues after college (22 years old), and go on with their life with basically no ill effects aside from the chance of a major injury sustained during their sport.
Whereas a 16 year old boy who shows promise as a professional athlete, works hard, and also dopes for 6 years until he's 22, and then realizes he's not cut out for the big leagues, has probably irreparably damaged his health.