On the angle that wearing protective devices induces an increased acceptance of risk, I offer this:
Autos and seat belts? just do it, it is the law in many places.
Motorcycles and protective gear? ouch! it hurts to be stupid!
Skiing and head gear? good decision for a variety of reasons in a Darwinian sense.
Hard helmets for contact sports? I draw the line at soccer, because I would like that game to go LESS physical in order to celebrate masterful play. There needs to be some team sport that accepts players with out genetic specialization!
Hocky and LaX have an image to project!
For me, there have been many times over the years that I have not, or did not wear a helmet while skiing. For the first moments, felt vulnerable, ( perhaps it was the exposure to cold air
but after a bit, it went unoticed. From that, I conclude that protective gear wearing does not of it's self promote additional risk taking.