In the end, almost all sports are partly decided by that. Take football: sure, tactics and styles are important, but use doping and you'll be able to keep running longer and longer and more importantly, you'll be able to use your supreme techniques longer. I've seen plenty of matches with teams like Barcelona, Valencia or Juventus where they just kept going and going and going as if they'd never be tired...honestly I think football has the most doping of every sport, simply because it's by far the most "financial sport" and the interests are so incredibly huge there.
No way FIFA will ever implement a decent anti-doping regulation and they will never get anywhere near IAAF, UCI, FINA (they might not be good, or even be bad, but at least they test).
My problem with sports like weightlifting is that the results indeed often change because of doping tests. The good thing is: they test.
My problem with sports like football and other major sports is that their fans are so blind and naive when it comes to doping. "No, it's a technical sport, we don't need doping." Oh please.