Those kids wouldn’t be moving around if they were told by someone to not do it.
I can see your point about dyslexia, though, it doesn’t really fit with ADD/ADHD, since this actually happens when your brain gets fried over certain things. However, the initial point still stands. I wouldn’t be surprised if 9 out of 10 kids “diagnosed” with dyslexia, don’t have dyslexia at all, but are just too lazy and have parents that simply just don’t care enough about proper education.
ADD/ADHD, however, is an empty name. A name invented for shitty parents to try and find an excuse for sucking at parenting and failing to give their children proper ethics and morals.