People use wheelchairs for a lot of different reasons.
Some people use wheelchairs because they are paralyzed and completely unable to walk. That is not the only reason people use wheelchairs, and many wheelchair users have some ability to walk.
Here are some reasons some…
Also respectful: Not making comments like “Look at you go!” unless they’re like popping mad wheelies and half-pipes and whatever the kids are doing these days I don’t even know, but seriously don’t express marvel that someone can locomote that is a douche thing