During my exploration, I found wheelchairs that you can sit in but can't move around in. It would be crazy to experience a zombie apocalypse as a paraplegic, for example, where you're forced to use a wheelchair, whether manual or electric. In addition to allowing for original gameplay, it can help you realize how difficult everyday life is for people with reduced mobility.
It would also be possible to move around using the wheelchairs you find, even if you are able-bodied.