While your two "helmets causing paralysis" examples do make a point; statistically speaking, are they significant? Is there a significant correlation between non-fatal accidents and helmets reducing/preventing injury? or vice versa, or is the data inconclusive?
I'm not concerned about fatal accidents, I believe you when you say that statistically, helmets don't save lives.
I personally don't care if someone chooses to wear a helmet or not. But, I am interested in the data.