Yeah, as far as I know, it hasn't been disproven.
Its scope has narrowed and is more nuanced. And it has made its way into the public lexicon like PTSD, OCD, ADHD, etc. so it gets thrown around a lot.
Here here. I have long taken solace in that fact.
Any society built around that would fail, human beings don't work like that. We form communities to take care and better each other.
Yes, like GreenKnight said, read more books, it helps with concentration, reading comprehension and just calming down.
It's great thing for not only your brain but your overall well-being.