Yeah, and it allows them to focus for longer than usual, they don't have the same calming effects as us, but there are performance benefits at the right dose for anyone (even non adhd folk)
I think it's a bit more than that. I'm not disagreeing, though, I think most people abusing it also have ADHD. I know I wasn't diagnosed through school and when I found out about stimulants I definitely used them to study.