I think you might be misreading this person. If the point of homework is to learn the subject, while tests assess your understanding of the subject, why do the homework if you already have a strong grasp on it as soon as the teacher explains it? If the point of doing homework is to keep you busy, there are better things to do with one's childhood. Unless the disability you're referring to is that they never learned how to struggle (because no struggle was offered)...

It wasn't necessary to learn the material, but homework counted for 20% of the grade in a lot of my classes, and if I had done more of it, I would've had a higher GPA that would've given me more opportunities later on. And, I would've practiced that skill of sucking it up and doing stuff that you don't feel like you need to do.

On the other hand, I had so much free time as a child and I spend a lot of it reading or messing around with computers.