I can guess some readers why wonder why I wear a helmet but why have been too polite to ask. Well, the original reason as when I was younger I mostly walked and while I am mostly confident in walking, I was sometimes unsteady on my feet and when I fell I really fell.
When I was 17 I fell on some ice and knocked myself out and this made me more aware of the risks. So in my 20s I started using a helmet and over a few years it just become normal to wear a helmet. And while I use a wheelchair much more, I still use the helmet, especially as the way I move my arms involuntary, I often clogger myself.
I also now wear a helmet because it has become a part of my identity and a trademark in the way some people always wear a specific hat, and why not? I believe it is important to reclaim need and turn it into a want as we define our own lifestyle.