Just because a helmet may not protect in life-threatening situations (according to you) doesn't mean it still doesn't help.
In both my case and a friend's, we both had (separate) accidents while wearing helmets. Had we not been wearing them, no, we wouldn't have died but probably would have at least gotten a concussion and a nasty cut/bruise. And in my case, I would have lost a great deal of my hair and scalp sliding sideways down a paved road at 20mph, so yes, I think helmets are useful.
NOW /thread.