Are athletes really getting faster, better, stronger? video comment

http://www.ted.com/talks/david_epstein_are_athletes_really_getting_faster_better_stronger


About the video I think he did not mention one important factor in the modern professional sports and that's the DRUGS usage which largely enhance the human capabilities in sports. Another important factor in increasing the motivation among the laypersons to get involved in professional sports is the big MONEY earned.
These both factors are cynically demonstrated in Lance Armstrong's case. Lance Armstrong is the latest most famous sportsman caught using drugs. But actually the point is that he was not caught really. The whole system failed in spotting him using drugs. He was "caught" only because his colleagues and then himself admitted using drugs. So the real question is how many like him are and were in the professional bicycling sport when the same faulty system of bicycle racing committee and organizers failed to spot them during the decades ?? And the second question is, why the whole media is keeping its mouth shut and not asking the same tough question again & again ?? Why it looks like the media and the various administrations of the different professional sports have a common interest in keeping their mouths shut and not to inquire too deep into this drugs consumption issue in the bicycle races and other professional sports ??
My intelligent guess is that the reason is the big MONEY involved in the various modern professional sports. The various sports administrations, as well as the media, are deep into the business of making big MONEY from the professional sports. So obviously they would not dare to go too deep into the rancid waters of drugs usage in the professional sports, as doing this would be like cutting down the tree on which they both are sitting.