Which is also why I don't think motorcycle helmet optionality makes sense from a "freedom" point of view either:

1. If your melon hits the ground and splatters open, there's going to a crash scene investigation that closes down the road for many hours, causing traffic chaos. As opposed to a helmet protecting you, where you're more likely to survive, and hobble off the road and get of the way of traffic.

2. Insurance companies generally do not have policies that offer helmet-optional and helmet-mandatory options, so if a motorcyclist who does not wear a helmet gets into a crash and needs a payout (life, or medical treatment), then those riders who do wear a helmet (which tend to have less severe injuries, and thus smaller payouts) have larger premiums through no fault of their own. At the very least there need two different types of policies.