That doesn't sound right to me. ADHD is a constellation of shared symptoms, grouped together and given a name for insurance and diagnostic purposes and because the treatment overlaps. The cause of those symptoms are obviously multifactorial, heavily correlated with both genetics and childhood stress. Bad news if your mom or dad didn't ever stfu when you were a baby, hardwired you to be uncomfortable without constant external stimulation and validation.

Schools at least where I live do a much better job of teaching kids to manage their emotions. And I hope parents of young children are doing a better job as well, seems like it to me, but I'm in a well off rural bubble.

I imagine TikTok sets back any progress and I'm glad it's banned. TikTok brain is a real thing. Human beings are meant to be able to focus intensely in one purposeful thing for several hours at a time and with practice anyone can learn to be highly productive and attentive if they can find a time and place to be free from distractions, and anyone can have a super memory if they set aside time and purposefully train their memory; memory is a product of focus.