The testing is a joke and only catches mistakes. Clearly the testing is flawed as so many athletes get busted without testing positive. So the question becomes why wouldn't riders support the testing they know they can beat in order to increase the profitability of the sport? Professional cycling is in crisis right now: fans are abondoning the sport and taking sponsors with them so budgets are down, cyclist futures are uncertain (ask Contador) as the GTOs and UCI continue in their childish fight, and the sport has become synonymous with doping so personal sponsorships and respectablity are off.
Maybe the pro riders are clean now, but don't you think that some hungry kid will use the next untestable wonder cream to win big if the chance of getting busted is less than perfect? Cycling is in a catch 22 right now- doping bust prove that cyclists dope and a lack of busts prove that the UCI isn't good enough at catching them. I don't know if pro cycling can ever reverse the doping image regardless of the doping reality.