Yeah, I am continually amazed at the logical fallacies employed to suggest that helmets work. "Look, my helmet is destroyed, therefore it must have saved my life." "I once crashed, and was only knocked out for a little while, obviously my helmet saved my life." In both cases, one could tell the same anecdotes with reference to a baseball hat, or a cycling cap, or even a particular haircut.

Cycling helmets are almost exactly like religion. Some people desperately need to believe that something located over their head is watching over them, and will protect them from the evil that abounds. No evidence can be found to support that belief, and it can't really even be logically defended as a hypothesis, but neither will matter to them until it is too late.