I just want to add some context here because i feel like there is a large gap in understanding of what a wheelchair actually is. Please click through these and get an understanding of the level of detail required to be properly fitted for a wheelchair.
https://permobilwebcdn.azureedge.net/media/hylifiyf/creative... - note the clinical rationale and notes sections on each of these options.
https://permobilwebcdn.azureedge.net/media/4ozh2ary/tilite-s... - seating cushions and backrests
https://permobilwebcdn.azureedge.net/media/npxlfuoh/tr-tra-o... - current ti lite order form.
https://permobilwebcdn.azureedge.net/media/hjvhuqlw/tilite-p... - component list / prices. There are almost 11,000 individual parts that are available for purchase for years after the chair is sold so it can be supported through the expected life of 5 - 7 years usually.
And through all of this you are working with professional therapists that are trained to properly size all these measurements, because an ill fitting chair can cause more harm than good.
This is a bit like saying that an ill-fitting bicycle can cause more harm than good: technically true but missing the point. Sometimes it's valuable to have a cheap bicycle that you can expose to the elements without worrying about messing up the high-end components on your more expensive bike.
These seem to be mainly intended as secondary chairs or for part-time wheelchair users, rather than as primary chairs. My wife has three wheelchairs and I can see a case for buying one of these as her fourth.
Mind you, the situation with electric wheelchairs is very different. Many electric wheelchair users are at elevated risk of pressure sores, may not be able to get in and out or reposition themselves independently, etc. The profit margins on these chairs are still inexcusable, but the amount of custom fitting and memory foam everything is warranted because the user may well be in this chair, in that position all day every day. The cupholder and the umbrella mount are must-have accessories.