I like the implication here that people are diagnosed having trouble focusing often because they have to focus often. As we in aggregate increasingly don't need to focus, it does suck to have to be one of those who does, and sometimes I can't, but it's also easy for me a lot of the time w/ no chemical help (noodly music does help.)
https://astralcodexten.substack.com/p/the-psychopharmacology-of-the-ftx
(Those pesky forgotten denominators!)