I still think it would be unfair on those who cannot afford it or gain access to it. Surely, there are countries out there which cannot afford to have their athletes on drug regimes and hence, they will be unfairly losing.
On the other hand - sports is always about extremities, pushing the boundaries of what the body can do - they already eat in certain ways, train in certain ways and wear clothing that will enhance their performance to their limits, track and field athletes are always looking for the best shoes...etc.
So in the end, sports is a combination of five things, I believe:
1) Technique
2) Body Anatomy and Physiology
3) Discipline and Training
4) Legal Aides (e.g. swimming with swimming caps, running with running bibs and running shoes)
5) Illegal Aides (e.g. drugs, non-textile swimming suits that were banned)
So what's the line between a legal aide and an illegal aide? Where do we (or the governing bodies) draw the line?