These sports have all done a better job of immediately catching PED users than cycling recently.
Cycling has by far the most extensive testing regime of any sport in the world. It's really not even close. If other sports tested like cycling, they would be seen as dirty also. It's a self-perpetuating
Also, cycling is better suited to doping than any other sport. There are a lot of tactics involved, but at the end of the day the team and rider with the biggest watt/kg numbers is normally going to win. It's a numbers game.