Isn’t the idea of banning doping in the Olympics to deal with people using banned substances while actively competing? That is to say, even though Phelps uses weed, has he tested positive during an active competition for being on weed (or any other substance)?
What competitors do in their off time is fine as far as I’m concerned. But if they’re using right before or during actively competing, then I can see where it’s a problem. No?