You are missing the experience of being tied to a wheelchair for a complete day.

None of the chairs you have shown are suitable for daily use. Even the "Magnesium" one.

One of the most important point (beside being the right size) is to be able to move the center of the rear wheels just behind the center of gravity. Too far rear and you have very good stability (hospital chairs), but you need to use most of your strength just to be able to turn (and you take a lot of space for turning). Too far ahead and it becomes dangerous. So it must be adjustable. In theory this should be possible on a cheap wheelchair, but I have never seen it. Probably the weight ditribution is too different (most is on the rear wheel) that the chassis must be thought differently?