Sure, adults should be able to take PEDs if they want to. But there's no reason to allow doping cheaters to enter sanctioned competitive events. It's no different from forcing all competitors to follow equipment rules. Like for the discus throw everyone has to use the same weight. Or for bike racing you can't install a motor.
Would you think it a poor dynamic if a company offered to pay people a good salary simply to be heavy sustained drinkers, but only for some limited amount of time? I'd say the problem is that the Moloch attractor tends to undermine this lofty ideal of "freedom of choice".
To me the decision to take PED's doesn't feel different than being an alcoholic or having an abortion.
I wouldn't recommend anyone become an alcoholic, but it's their life and people ought to have the freedom of choice.