You were disabled and realize it is not getting better, and no one seems to be able to fix the issue. You’re stuck laying down most of the day, you have enough mobility to function at home, but anything outside of home leaves you in bad shape beyond your control where you are not professionally functional. What do you do to earn a living and survive?
This is not a hypothetical for me.
Arts come to mind immediately: drawing (mainly furry porn), modelling/sculpting (3D or clay), painting (painting minis for nerds is more lucrative than painting canvases), music, writing.
Programming and web design also don’t require physical labor other than you being able to type on a keyboard or equivalent.
There’s also video content you could try, either as creator or editor. Video editing is a skill needed by both big time and internet creators