In a sense you are right but as I consistenly point out, Lance is not just another athlete like the guys you listed or Merckx or Contador or whoever. Lance represents something else entirely, a cancer survivor, if Lance were just another athlete, he would have had nowhere near the same riches, fame, leeway etc. He is not even the most successful 4-5 cyclists of all time but he dwarfs all other cyclists in terms of fame, not because of his athletic success but because of his STORY.
Its how he used that story to cheat, bully and manipulate his way to the top that is the biggest fraud and grinds with so many people. ItS not just about the doping. Lance allowed himself and actively promoted a certain image of himself as the survivor, the great hero, the cleaner than thou cyclist. 
Any guy who starts of from the point of 'I survived cancer so no way would I put drugs in my body' is putting himself on an almighty pedestal and the thing is so many people knew he was doped to the gills from the start. The French for a start, the likes of Kimmage, Walsh. By 2004 and the Simeoni incident it was obvious to all with a brain that he was truly a doper.
I have no doubt without the cancer angle and the fame and success that brought to cycling, Lance would have been brought down long before he ever got near 7 Tours wins. The cancer angle was always cynically used as a shield and I find that offensive and immoral.
I think most people would like to see him go down not because he cheated but of how he used cancer to camouflage that cheating and promote himself as some sort of icon with all the attending posturing and BS. I really dont get bothered by dopers, I dont hate on them the way some do on here, I understand the part of doping in the context of cycling history. It does **** me of when someone is busted and I wish it didnt exist but I deal with it in a rational manner.
What Armstrong done and got away with goes far beyond the realm of just another doping cyclist and to have listen all the BS around the guy for the last 7-8 years all the while knowing he was a fake, well I just find it hard how anyone can not want to see him go down. To me Lance is the perfect figurehead of an immorally bankrupt society in which fakes can become super-rich icons based on nothing more than lies and BS.