Let me disagree

. He was the greatest doped Tour de France competitor ever, among a slew of doped competitors.
Perhaps some cyclists were not doped. But who knows and who remembers their names since they were overshadowed by a cheater?
Anyway, it's a little bit off topic.
In fact, either you say: "let the show begin". Doesn't matter whether anyone is doped, provided there are quads and transitions and so on.
Or you think the competition may be very interesting even if there are only triples, provided there is a healthy rivalry (I don't know how old you are but for instance why do we still remember the battle of Carmens? because there was a battle, not because there were (some double) jumps).
As far as I am concerned, as soon as you say that doping is not permitted (which is only a choice), you have to disqualify any cheater, even the youngest, not because (s)he is guilty, but because the next competitor is not doped (or is deemed to be clean until proven doped as well).
We'll see...