The last time I skied, I wasn't wearing my glasses and didn't see a jump so I took it, panicked, bailed and went sliding down the hill and stopped by smashing my wrist against a thick tree stump. Hurt like hell but I'm glad I didn't go head first. But I know a lot of people who have hit their head and got concussions or other injuries.
That said, of the deaths I know about at the nearby ski hill, they weren't caused by head injuries. Still, it is a good idea to wear a helmet and I should've worn one since I wasn't experienced at all. Complaining that the government is controlling your life because you have to be safe and wear a helmet if you're a minor is borderline pathetic.
Saying that the government is "controlling your life" over this is something of an overreaction, but it is these sorts of invasions into our personal decisions that I believe ought to be opposed as a matter of principle.