DING DING DING! We have a winner.
You just nailed it. IF everyone was doping, and Armstrong's team was just a little better at it and never got caught the whole witch hunt retroactive punishment is still a moot point.
Everyone seems to think Lance doped, and they all also say Everyone doped. So it is only fair that either Lance's records stand as he was never found guilty during his time racing or they just need to go back -- decalre a certain set of years as "THE DOPING PERIOD" and wipe out ALL THE RECORDS! period.
And everyone else who did cheat either got caught and/or fessed up to it [or is in the process] and have accepted their punishment -- except Armstrong who is doubling down on denial in the face of overwhelming evidence.
So in that respect he is "not doing what everyone else did".
The reason why Armstrong won the ‘99 TdF is because the they took doping to a level nobody had seen before. They had a guy on a motorcycle follow the race around France getting dope to them- so it didn't need to be transported in team cars...which nobody in the TdF wanted to do after the heightened security from Festina scandal.