You can beleive anything you like about Lemond, but it would be good to make a few things clear.
Lemond was an amazing, natural talent. His VO2max is documented at 93. Compare that with LA's 82 (which he fudged up to around 84 over time on his web site). For Lemond to do what he did in his first Tour was extraordinary, but not unprecidented. Recall how Merckx faired in his first TdF. Lemond was also riding on arguably the strongest teams in cycling at the time with a team leader of great class.
Lemond did not test positive in an era where the drugs used were quaint compared to the 1990s epo/hgh+ period. There were tests for virtually anything Lemond might have taken, with the exception of blood boosting. No evidence by anyone ever involved with him has pointed to blood boosting or any form of cheating by him. Perhaps you have some facts to share that support your assertions?
There has been an acusation/threat made by LA that Lemond used epo and that LA would get people to testify to epo use by Lemond. Lemond called that bluff and nothing ever came of the attempted intimidation.
Lemond's performance in the Tours of the early 1990s and the 1993 Giro in particular are indicative of doping riders raising themselves to at least the natural ability level of Lemond with the added advantage that the dopers' hematocrits did not naturally drop off as the Tour/Giro moved through their three weeks.
That said, ona personal note, I rode one race with Lemond participating in 1983 just after his return from his first year as a pro with Renault. His class was amazing as a rider. Whilst I never had the opportunity to ride a race with LA, I saw him race on several occasions prior to the Barcelona Olympics and LA exhibited striking ability, but nowhere near Lemond's level.
Still, thank you for sharing your thoughts.