“People with physical disabilities would have a greater need for a handgun for self-protection than non-disabled people.”
What about people who are blind?
My brother who is legally blind managed to kill two Tom Turkey Gobblers in one shot... in the wild!!! Still amazes me!!!
Many "legally blind" people can still safely use a gun. If the "legally blind" person can keep all his shots in a man-sized target at 7 yards, then he sees well enough.