If you think your head is a wothless blob of jello that does not justify spending even 30 bucks on a cheap helmet then I agree. You don't need to wear one. Society would be better off if you incurred a head trauma and we no longer have to listen to your worthless rantings.

I don't care if you wear one or not but when I see someone without one I immediately realize just how stupid the most intelligent mammal on earth can be.

Even a moderately low impact crash can cause permanent head trauma. I have broken at least 10 helmets while riding my mountain bike on serious trails and crashing. I'd bet I would not be the highly intelligent and sophisticated individual that I am now if not for a helmet.