That's just an ADHD thing. They can do a line of coke and all it does it allow them to feel like they don't have ADHD for a little while.
That was exactly my experience. It was the most boring drug ever, just made me focused. My friends were partying around me, and I was like "cool, I can plan my meals for the week in my head. Yay."
I guess YMMV on whether focused is boring or not. I agree that I never really found stimulants to be super interesting, but thats partly because it was too expensive to do coke just to work on whatever project was on my mind.