Please get off of it. With all the horrific things happening in the world, move on about being an adult in a wheel chair and being treated like one.
Be happy if someone is considerate and takes the time to try to help or assist someone they may think needs assistance. This could be anyone, and not necessarily someone in a wheelchair. If you don't want the help, then tell them so. Simple as that. Stop this obsessing about whether it is an assault or someone feeling "pity" for you. I thank God that my mother was a dignified and gracious women (in a motorized wheelchair) who had enough common sense to know how to deal with someone trying to assist her. Get a life!