I suspect you haven't met too many people in these programs. I had a student in one of my university programs who was handicapped and could barely see 3ft in front of him. Guy had to ride in a motorized chair, get guided around campus, and use a super-zoom lens and a laptop screen that made everything 10x-50x its size to be able to read the whiteboard/presentations. I'm sure none of that stuff was cheap.

But that guy was awesome, fun, and super clever. His lowest score was an A-, and he had a great character. I'm sure he had to work ten times harder than I ever did just to get into that position, but I never heard him complain. Personally, I think keeping a mind as great as his in some sort of hedonic trance instead of letting him learn and contribute would have been a great loss, and possibly quite cruel.