> People from age 7 up into their 70s ride their bikes regularly and safely - so safely that bike helmets are a total rarity.

Bike helmets are designed to provide some degree of protection in simple falls, meaning falls that are caused by lots of control as opposed to a collision with another object like a motor vehicle.

I've heard that older Dutch cyclists are dying due to head injuries that could be mitigated by using a helmet or riding a trike insured of a bike.