Yes, LA is no question guilty and is now paying for his past doping sins. But if you strip LA of his titles and ban him. Than we have to apply the same rules to past cycling "champions" as well. In which case, we would have to go back 50-60 years and do a clean sweep. If you are a cycling fan, that means Coppi, Anquetil, Bartali, Maertens, Merckx, Hinault, Fignon, Kelly, Indurain, Contador, etc, etc., basically every top rider from every generation. Each were using whatever the best "dope" at the time was, be it cocaine, caffeine, amphetimines, EPO, blood transfusions, steroids, etc. Hell, some of these champion riders were even caught red handed or failed doping controls. At least in LA's case, he never (officially) failed a dope test in competition. His downfall was from testimony from team mates and a financial trail of payments to known trainers and doctors with a doping record.
Dirty cycling is getting an airing right now. But let's face it, every physically demanding sport is dirty with dopers. It's just a case of cover ups or turning a blind eye by the governing body. One of the biggest doping scandals in cycling in recent eyars was "Operation Puerto" in Spain. Of the dozens of blood samples and EPO vials found, half belonged to football players from various top European Divison 1 teams. FIFA just happens to be a bigger and better financed governing body than the UCI, so there was no repercussions and nothing ever came of it in the football world.