It is an omertà thing. If someone witnessed or facilitated Lemonds doping then they themselves are guilty and not going to come forward. That Lemonds time trial was so dominate on sub standard equipment and it stood for 25 yrs vs racers on EPO and other doping is the key here. It is way too good to be true And thus there is no way it was clean. Riders used to openly drink and do coke during the tour and it was accepted.
It took shit for brains Floyd Landis to come up with the whistle blower play because he was broke and his hip was messed up so nobody wanted him to finally bring down that whole generations house of cards.
if You French Fry when you should Pizza you are going to have a bad time