Relative to other sports it doesn't require much skill that can't be easily quantified. The person who can produce the most Watts over the required window is a strong favorite. I assume that doping simply makes a difference in a way it doesn't for skiing or soccer, and probably not as much as even swimming or running.
Why not? Its a big difference whether you go ski jumping in leggings or in a wingsuit. Obviously the difference in reality is less, but the principle stands