Amusing no one wears helmets.
Some people have real problems grasping this. Cars are seen as inherently dangerous, pedestrians and everyone else should (ideally) stay off the roads, and nobody should challenge our "right" to drive where and when we like. But driving is still a choice, albeit coerced since there are so few alternatives, and that choice has profound implications for others. Why should I wear protective clothing because you choose to drive a vehicle which puts me in danger? In the Netherlands, to respond to your point, they have largely eliminated motoring-related danger for cyclists.
If anyone is interested in the development of Dutch cycling infrastructure, this is an excellent video:
https://www.youtube.com/watch?v=XuBdf9jYj7o (How the Dutch got their cycle paths, 6m 29s)
David Hembrow has an informative blog about all things cycling in Holland: