Absolutely not. In fact myself and others I know who are physically disabled know that in modern society since we're not physically fit our minds are the only things that make us worth anything in terms of getting a job and surviving and that leads to a massive drive to learn. Some are so disabled that learning is really all they have, what else will you do when confined to a bed for days, weeks, months, even years at a time except learn to keep yourself from going insane? I should know, I've been there.