It's a meme, I'm not writing comprehensive policy here
I'm responding to your comment, not the post. This part:
If a disabled person ... their disability should therefore ....
You really can't make generalizations about disabilities like this.
Lots of people think disabilities are visible and easy to categorize. They're not, and this attitude leads to scenarios like random people harassing actually disabled people for using a handicapped parking spot.
My point is, like, mind your own business and don't make judgy proclamations about what disabled people can do.
I take it from the downvotes that this is not a place for discussion, this is a place for confirming your biases. Carry on.