There are a number of reasons why cycling has a worse image than other sports.
The Festina affair was the percusor to widespread talk and knowledge of doping in cycling. Lets face it, the biggest riders on the biggest teams at the biggest annual sporting event got busted. This is when cyclings bad image started. Until something else similar happens at the Olympics, World Cup(football), Wimbledon etc cycling will be the only sport with that image.
These other events will never have police interference because of political backing, imagine if the police raided the Olympics, I bet they would find just as much illegal medication but can anybody ever see it happening. No.
Unlike most sports which would have just buried their problems, cycling actually tried to do something about the problem and to fix it you have to admit it exists which other sports refuse to do.
Cycling is not big in any of the English speaking countries, lets be honest, most people see it as a quirky sport, a bit gay etc so its easier to dismiss than any of the mainstream sports, soccer, rugby, Cricket, US Sports or Aussie Rules and most people on here are native English speakers.
Not blaming Lance but since he is such a divisive figure, it seems that talk of doping has definitely increased since he returned.
The doping stuff is like an extra dimension to cycling, its like a soap opera and most of us are intrigued by who is doing what, etc. I will admit to having a curiosity about doping. Maybe its because I dont watch soaps.
There are too many on here who constantly talk about doping, again I am not innocent but try to avoid starting another thread on doping.
The cyclists themselves dont seem to want to stop doping keeping us so well fed with news.
Maybe people have other opinions on these points.