@chai2,
Armstrong's position, I assume, as it would be mine, is that it was fair because all the other riders in that gruelling race could have done the same if they were as determined and dedicated to winning the titles for the US and for himself and his teams, as he was.
And the ones who didn't, or dare not, just weren't up for the ruthlessness of modern sport and preferred it to be an exclusive domain for the better off which is what most sports used to be and many still are.
As long as he has sound medical advice and knows what the risks are he might be seen as a pioneer in the practical science of performance enhancing generally. Pioneers in medical science have been known to seriously injure themselves and to kill themselves using their own bodies as guinea-pigs.
Training is cheating. When I was in the latter stages of compiling my largest snooker break the chat from the sidelines was that I had a secret snooker-table at home and had been practicing a great deal which they couldn't do because they hadn't the time or the facilities. Neither had I actually but the implication that practicing is cheating was what was being expressed and that honed skills are not down to natural ability but to the honing.
Everybody cheats. Except maybe a hobo.
What do the U.S. Anti-Doping Agency and the World Anti-Doping Agency produce except the creation of bogus jobs for themselves and cheating to get them and pass them on to approved persons--know what I mean duckie?
Increases in ticket prices. And appearances on TV which they could never have managed any other way.