I can't really care about skater safety equipment when we allow cars to exist.
Depends on what you want to figure out. For finding out the comparative danger of an individual doing activity A versus activity B, sure. But if the group doing something exceedingly dangerous is quite small, it might not warrant an intervention as far as public health etc is concerned. Scale matters (sometimes).
On the flip side, you can of course argue that the individuals who just happen to be in proximity of the dangerous activity are being unfairly exposed to risk they haven't consented to (if the activity poses a danger to bystanders, that is). We don't let people do whatever they want just because the people it affects are few, either.
Here, this wikipedia page gives an overview: https://en.wikipedia.org/wiki/Pedestrian_safety_through_vehi...
Skateboarders want to skate board. And if you participate in this activity, put on a helmet.
There’s a good reason old people sound crotchety. We look back at what we used to do and realise how stupid we were. So many risks taken that had no pay off.
Though, yes, even as a skateboarder I don't condone the hill-bombing as it is legitimately too dangerous.