But how can you say it didn't Dave your life? If you are in a crash and come out alive then, in whatever way, your life was saved. You don't have to be hit hard to sustain a life threatening head injury - even having an 'SPD moment' could mean you hit your head hard on a kerb which could potentially cause massive injury. A helmet in that situation would probably do a massive amount to lessen that. Having the logic of "if it's going to kill you it will kill you', then why wear seatbelts in a car? Why have airbags.? Why give soldiers body armour? None of those things can guarantee to save your life, but they will damn well do a better job than not having them!
So, so many assumptions and half truths in that it's difficult to know where to start.
But basically, it can't be PROVEN that cycle helmets save lives and when someone trots out the old line 'if it saves one life it's worth it' you have to remember that is IS proveable that a healthy and active lifestyle does save lives and that forcing people to wear helmets stops them cycling to some extent.
Generally, I wear one. But I'd fight tooth and nail to keep them optional.
Impossible to police anyway, so it's a mute point.
And I seriously doubt it'll ever happen anyway.