Yeah but if I'm going to sit on something for 14 hours of the day for every day of my life it better be comfortable and not give me pressure sores. Also my level of injury necessitates lots of additions.
There's a lot of people that use wheelchairs for part-time use. When I was considering getting one, I could walk a couple minutes but couldn't go farther without injuring myself further. Having something cheap that could get me some freedom back would have been worth it, even if it's not perfect.