Wrong? I can't speak for all sports, but I know an ex-professional cyclist. Doping is less prevalent in the States than in Europe, but even in the States you see amateurs doing it occasionally. Plenty of Euros dope, but more ride the fine line of "therapeutic use" exemptions for drugs that just happen to improve their performance by a percent or two.
They're not all doping, but at least in endurance sports, many are.