Tests are A+ evidence, we agree.
But when his whole team back then got caught somehow then snitched on him, his boss is highly suspicious and suspected of doping practices along every team he has ran, his doctor has been caught, his nurse snitched on him, there are proof that he basically bribed the Union (150K), that he had close acquintances with suspect labs... Then you realize that he was THE BEST ever but the only one clean ? Ulrich, Basso, Vinokourov, Contador, Mayo... all got caught and he was better than them by miles !
Come on, don't be naive : everybody doped, he was not the only one. It was just a matter of time.