It should be mention the learning disability also include dysgraphia, which include handwriting. If the motor skills is impaired, then that get classified as a learning disability regardless of how easy the person can learn a complex subject in higher education.

I view it similar to the ability to throw, kick and catch balls. Today it doesn't say much about a person ability to learn, but in the old times I can see the argument that it would be a hindrance in going through the education system. Not a learning disability per say, but a schooling disability.