Chris James: My view about the wearing of safety equipment, whether that be cycle helmets, seatbelts in a car, eye protection in the workplace etc is that in the event of an situation occurring when the wearing of the safety equipment is warranted then the wearer will be thankful that the safety equipment has indeed been worn. (I appreciate that there may be circumstances when the wearer of the safety equipment will not be thankful for wearing the equipment; for example, wearing a seatbelt in an aeroplane and not being able to undo it when the plane crashes.)
So therefore my viewpoint differs from yours in that I believe that the wearing of a helmet has nothing to do with the benefits or otherwise of cyclists who never have the need to have a helmet on their head. I believe that the requirement for a helmet is totally relevant to those cyclists involved in a incident when it is of benefit to them.
Now there is a law in place in this country which places an obligation on car drivers/passengers to wear a seatbelt but at the moment there is not a law for cyclists to wear a helmet.
Obviously, there needs to be a debate to decide whether the compulsion of cyclists to wear a helmet is, in fact, appropriate for legislation to be introduced. I know that there will be have been serious debate somewhere which has looked into the pros and cons of helmet compulsion but I, personally, am not knowledgeable about where that debate is up to.