The symbol is of someone in a wheelchair, if you dont need one you shouldnt be parking there.
I met someone just like you in the parking lot of the post office about fifteen years ago, he made a snarky complaint as I was getting out of my car, the front space right at the door, the fact that I could drive and was able to walk allowed him to assume an make an incredibly insulting remark. My answer to him was to pull my hair over the side of my head and show him the two enormous scars from brain surgery, gave him a good look at the third one that starts at the center of the back of my skull, it goes all the way down to the small of my back, he didn't get to see that part; I will refrain from repeating the reply he got.
Not every disability requires a wheelchair.
And some people demonstrate their paralysis is from the neck up.