Not remotely difficult to understand PIME.
If you are waiting for absolute certainty, 100% clean sport, or better still proof of 100% clean sport. Give. Up. Now.
It ain't never gonna happen.
Because -
1. You can NEVER prove a negative. It's simply a logical impossibility.
There is not a single athlete in any sport you can prove with 100% certain never doped. Not one. And that includes Moncoutie, Bassons and Lemond, all of whom are broadly accepted not to have done so.
Broadly accepted. But not proven 100%. Because as a matter of logic, it simply can't be done.
You cannot prove, 100%, that Greg Lemond, at some point in his life, on one occasion with no-one present, in some far flung hotel, did not dope.
I don't believe he did, not for a second. I believe he's clean. Strongly. There's lots of evidence to back his claims, very little if anything at all against them, and the same goes for Montcoutie and Bassons. But not ABSOLUTE proof. That's impossible.
I repeat again; you can NEVER prove a negative. So if your waiting for proof of 100% clean cycling, you're wasting your time and everyone else's. It is never going to happen, not in our mathematical universe. and the same goes for every sport. Every. Single. One.
2. People are people.
Haters gonna hate. Losers gonna lose.
And cheaters gonna cheat.
Now you can reduce incentives, and increase disincentives to cheaters; you can make it difficult for them logistically, even morally if you can change the culture. You can increase punishments, and fund detection. But some b*gger is always gonna try. So long as people have ars*holes, some b*gger is gonna try.
You name a single rule, doping or non-doping. someone, somewhere, sometime will try and break it. Use a taxi in a marathon. fix a cricket match, or a football match. punch a defender off the ball in gaelic football (classic meath move

). Would someone try and put a motor inside a bike, like the silly Cancellara allegation. If they could, Damn right.
If you can't get behind a sport and its effort unless its already proven 100% clean, take up knitting; you're wasting your time otherwise. And to call for the impossible is simply silly, and naive. you may as well complain water fairies aren't sprinkling magic dust on Boonen.
So there's the truth.
And say you're JV, or if we don't trust him, it can be actually any of a host of people in love with an imperfect sport, in an imperfect world. And after eight decades of doping, and two of super charged doping, there are small small signs that your guys, who you are trying to keep clean, have a chance to compete and win clean - removing the deepest and most perverse doping incentive of all - the idea you can't win clean. That what doping exists (and it DOES exist) is less widespread, and certainly less effective than a few years previously. Jubilation? no. But some sort of happiness. Yeah, why not.
And by itteration, slow, boring, work you make the sport cleanER. because really, really, it's all you can ever, ever do.
So why don't you use your energy to help that, at whatever level you can. Personally, I'm writing to Cycling Ireland to try and get them not to nominate Pat, for all the good it will do. I donated, several times, to Kimmage. I'm very likely to be doing a masters soon, and then a PhD in international sports law, because I'm interested in using my skill set in the area - there's a course in switzerland, but i'm hoping to set up something closer to home (and cheaper). Little things, from little people.
Or equally good, find something else that you do trust 100%. But avoid religion. Tends to be a let down, like all cults.