A form that is still extremely rare. No-one seriously advocates helmets for car passengers, for example, even though the injury rates are very similar.
> be hit by a car
Cars don't hit people, drivers hit people.
> They don't prevent you from doing anything you would otherwise do.
They're annoying enough that they do, in practice if not in theory. To say nothing of the fact that drivers pass you closer and more dangerously if you're wearing a helmet.
> helmets are a fantastic example of reasonable PPE, not overactive safetyism.
Quite the opposite.
