No. But neither can you, regardless of the activity. And that's the whole point, despite the fact that you'll dismiss it because this is a bicycle site: people weigh risks and benefits all the time, and come up with various solutions based upon their own data. That their solutions might not match yours does not make hem stupid, Darwin candidates, organ donors, or anything else.

I mean, sometimes I do wear a walking helmet, if I'm walking up mountains with ropes. That doesn't mean everyone should wear a walking helmet for every walk, and it doesn't mean that I'd call you names on the internet if you measure your risks of walking and decide to do it bareheaded - even though you can't say for absolute sure that you won't have a walking accident tomorrow.