I commute on a bike whenever the weather is decent, and have been doing so for over 30 years...do you think I'm concerned about being injured? No, but I'm not reckless either, thinking that could never happen to me.
Ok now lets play fantasy land, if helmets were ever made illegal I would probably stop riding! Why? Because I've had enough accidents and seen enough accidents and know people who had accidents to know that helmets save lives.
But fortunately helmets will never become illegal because common sense prevails over the likes of an idiot like John Stossel!!