Trouble is, that's what you are effectively saying about Wiggins, Evans etc. I honestly believe that certain people are more talented than others, and the level of doping now cannot be compared with Riis and co. Evans has run very close to winning, Wiggins did well, Van De Velde has done well too, all class, and in all probability, not doping. To add to that, look at Contadors blood values from last year, look at Basso's attacks in the Giro and it does seem that we have a much closer playing field thatn we had before, hence me believing that you can do well clean.
It's all opinions, none of us truly know, we just use the known facts as we can to make our point.