When does Helen Keller know to stop wiping? Once the toilet paper stops tasting funny?
I'm not sure what you're getting at. What are you implying about people with disabilities?
Disabled people are useless.
Disabled people have a wide range of capabilities, and it's unfair to maligned them as in capable of doing normal tasks. Often, disabled people learn to do normal tasks with a level of effort that is impressive and admirable. Instead of perpetuating negative stereotypes about disabled people, you should learn more about the extraordinary efforts the disabled people make in order to integrate into a society biased toward able-bodied people.