I'd maybe agree if we'd be talking about depression or anxiety, which you can get during your lifetime, but ADHD (or autism) is just the way your brain is wired and can't be "healed" like some other mental illnesses

At this rate of classification down the path we're going, it'll be weird to not have ADHD

This reads like there's more people with ADHD than there were in earlier times (which we don't know).
Testing just got a lot better than it was

That's why I started setting alarms with just enough time left do get ready for the thing
(sometimes they actually help with the anxiety)

hnRNA?