Earlier quoted context omitted.
ADHD is not a in the same class as “defects of human physiology that exist or come to exist from sitting and focusing on one thing (usually alone) for long periods of time.” Here is a better definition: ADHD represents the extreme end of the distribution of several highly correlated normal traits in the human population, just like intelligence. In this case, these are inattention (specifically distractibility, poor p…
We have partially lizard brains that evolved for running distances to pack hunt. If your expectations are that we should all be able to sit for 8-10 hours a day from the time we're children, it's easy to say some percent of us have a defect. The defect -- to me -- doesn't seem to be that some percent of our lizard brains can't do that. It seems to be in our expectations.
But while we’re waiting, we’ll do what we need to in order to survive in the society we have, not the one we want.