I suggesting reading up on ADHD before making this claim. ADHD is an absolutely deliberating executive function disorder. It is not restlessness or a personality trait.

The biggest difference is in self-motivation. Someone with ADHD will desperately want to focus on something they like, but they can't. For many things, there is no amount of desire that can overcome this limitation.

This is very different from a kid who just isn't interested and wants to do something else.