Where Lance goes further is with intimidation, bullying, running a systematic doping programme for the team. alleged corruption, sheltering behind his charity, liaising with A-listers for protection, the list goes on ...
Indeed, I agree, the problem is that it's all these extra aspects that make him totally inappropriate for involvement in any anti-doping programme, or any other role involving managing or educating
It's probably always going to be a difficult judgement call whether any particular ex-doper should be
allowed to be involved in such programmes - someone like Millar seems (from a distance) genuinely contrite and has showed he was willing to work hard to win clean. I get the impression that people like maybe Vinokourov OTOH are just shameless cheats.
In Lamestrong's case, though it's clear, it's not just the doping but the systematice bullying, intimidation, hypocrisy etc that make him the wrong person to be involved in trying to clean up cycling.