Boardman won a lot more than just the world pursuit title.
World tt champ, Criterium international winner, stage wins in just about every non GT tour both in the road stages and in TTs, top 3 in the Dauphine Libere, Paris Nice and tour de Romandie, several TDF prologue wins.....
Boardman also didn't turn pro until he was 25 and was pretty clueless when he first starting riding in the pro peloton. A peloton that at the time, was like the wild west in terms of doping.
The point here isn't about Boardman , but that he achieved what he did against some of the worst doping in cycling history, with very little pro experience. Achievements which according to some, are impossible without doping.
If Boardman could achieve what he did, then a clean rider with a similar engine, turning pro at 19 or 20, already with years of continental race craft, should be able to perform even better.
And what does it mean?
It means that, not everyone who wins at the highest level, are doping.