I am sure that LeMond and all the riders of that era, Delgado, Indurain, Chiapuuci, etc etc, all of them doped.
It doesn't detract from their achievement or my enjoyment of it one little bit
But things hae changed and now they want to get rid of doping, and that's a good thing.
But that Contador and the likes still ride like monsters on the big climbs and so on does not for me mean that they have to be doping. It seems there is a group of people that think anyone who is winning ro climbing faster than the main peloton must be doping. This is not at all necessarily the case.
Look at athletics. They had all their scandals about doping and now they have loads of testing etc. Yes, they still have people who try to dope, but then you also get guys like Usain Bolt who are getting amazing results and are testing clean.
I'm happy to assume LeMond et al were doping, it seems everyone was back then, but I don't think Schleck and so on are, or at least I'm willing to believe they aren't until I see a positive test from one of them. Nor do I believe there is a conspiracy of silence or anything in pro-cycling, there are too many people involved.