Then how do pilots takeoff, fly and land in the dark with heavy fog? It's called IFR, instrument flight rules. If you can read the instruments, you can fly a plane. I don't see why instruments couldn't be set up for a blind person.
Some disabilities can be overcome. Apparently these days loss of your legs can get you running even faster with special springy artificial running legs.
Apparently these days loss of your legs can get you running even faster with special springy artificial running legs.
Even faster in an arm-powered bike. I'm not sure what your point is.