This is as naive as drivers refusing to wear seatbelts. In serious crashes, you cannot control your body in the first place. Of course, the helmet is only 10%

This is as naive as drivers refusing to wear seatbelts. In serious crashes, you cannot control your body in the first place. Of course, the helmet is only 10% of cycling safety. But it's for that important 10% when your head crashes into the ground. Suggesting that it would never come in handy is naive. Since you seem to believe in the power of personal anecdote, I am an experienced cyclist and have crashed directly on to my head before. It was just once, but it prevented a serious head injury.