In many countries with high numbers of cyclers an adult can jump on a bike and cycle along the footpath without a helmet. In Australia you can be fined over $400!
Helmets are great though. Too many people end up with cracked open skulls just from falling over at slow speeds.
No you’re absolutely right. On an individual level, it always makes sense to wear a helmet. I’ll always see someone without a helmet, whatever the context, and think they’re a fucking idiot.
Yes, even in the Netherlands.
But individual decisions are not the same as public health policy. And from a public health perspective, mandatory helmets are a net negative.