Well, like Barry Bonds and Ben Johnson, he was the best at his chosen sport, and took drugs to do better at a time when many or most of the people he beat were doing the same thing.
It's the prerogative of people running a competition to say what training methods and substances are kosher and if someone breaks those rules they run the risk of getting caught, punished, and banned. But moral outrage? Eh, I've only got so much and this seems like a lame way to spend it.
"But people looked up to him and he's a fraud!" Yeah, people thought he was a hero because he was really good at riding a bicycle. Only it turned out he was a guy who was really good at riding a bicycle who also used banned substances to make him better at riding a bicycle! I'm sure Nike feels very cheated after all the merchandise they were able to move based on the only marketable American cyclist since Breaking Away.