In a way I think you are right, the lifestyle/persona of many skiers might square against the sensibilities of most people at the Olympics, but IMO, there is something fundamentally different from what skiers do and what people on "Jackass" and other movies/shows like that do. If you look at some of the great things about skiing; all the movies, photos, segments, comp runs, pow days, kid landing his first trick etc., there is a certain skill, style, flavour, (or whatever you want to call it), in it all. While there are inherent risks in both skiing and "Jackass", and while these dangers may be capitalized on in both things, the similarity stops there. At the end of the day, there is nothing that amazing about some buffoon running through hallway with a bunch of tasers hanging from the ceiling- anyone can do that. However the end result of riding away from something scary on skis is rewarding, a display of skill, and sometimes even beautiful, even an art.(movie segment, photo, etc.)
I mean, Bob Costas obviously has no idea what he is talking about, but if you showed him a Candide Kamera or something like that, I'm sure he might see a little more to freeskiing than a simple reveling of self-harm (like Jackass).
I have no idea if any of that made sense.