Now that's a spurious reasoning and, paradoxically (in light of the accusation you made), rather simple minded.
I for one have found Contador to be agreeable because of the gentlemanly class with which he has always comported himself, Pharmstrong's got nothing to do with it.
Independent of the antipathy with which I have always regarded Pharmstrong, my judgment on Alberto resides in his personal character, which his presumed doping, in a world that's doped, has consequently left unaltered.
By contrast I have found Lance to be despicable, not because he doped, but for his nastiness and the fact that he's an arrogant bully.
But as to Contador’s ban, well, technically and morally it is the correct decision, even if in the hypocritical world of professional sports it is difficult to swallow, particularly in light of the way in which Lance was sustained by that hypocritical establishment and was basically able to get away with murder.
It’s the double standard thingy and the habitual mendacity of the sporting world that’s patently offensive in cases like these.