I also wonder how Americans talk about ADHD as if it is something bad.Last regular go-to-the-office job I had there was no end to the number of people who would proudly declare how ADD they were. I think it was a roundabout (and ironically commonplace) way to say, "Look at me! I'm so creative."
I finally decide that the way to tell if someone really did have ADD was to note how often they seemed so cheerful about it.
Prescribe meds against it, even.
Have you ever been driving on the highway, and found yourself struggling, I mean really struggling, to pay attention to the damned road, because it was too boring and your brain kept deciding to redirect your attention to everything else on the off chance it was more interesting? Knowing that if you don't pay attention you could die, yet having to fight to look out the windshield?
ADD is not about a lack of attention, it's about inappropriate attention. Sometimes that's a wonderful thing. Sometimes, though, you really do have to pay attention to something even when your brain has other plans.
BTW, schizophrenia and major clinical depression might also be considered "a vital part of [the] self" but not everything you're born with is a 100% good thing.
People taking brain drugs need to weigh the pros and cons.
If you're happy with whatever chemical soup is naturally in your skull, more power to you. Other folks might need some seasoning.