It's far from proven that wearing a cycling helmet has a net benefit from a safety view point. Helmets are useless above 13mph and not a lot of good at low spee

It's far from proven that wearing a cycling helmet has a net benefit from a safety view point. Helmets are useless above 13mph and not a lot of good at low speeds. What's more, they may cause accidents as they can restrict vision, or make riders slightly less responsible as they "feel" safer and consequently take more risks. Rule number 1 for a cyclist is: don't have an accident. I suspect helmet wearers have more accidents. I speak from experience having been hit by a cyclist who didn't see me because his helmet restricted his vision.