Earlier quoted context omitted.
That's absolutely not true. Diabetes for instance used to be extremely rare and limited to the elites. And, for instance, ADHD probably isn't a disorder if you live a very simple life and do manual labor all day. No hyperactivity, no DMV appointments, and your life is decided for you. Remember, all the lines are drawn arbitrarily and something is labeled a disorder when it doesn't work with our (very strange) modern…
"ADHD probably isn't a disorder if you live a very simple life and do manual labor all day" Why?
I have ADHD bad but it virtually goes away while backpacking for reasons I described.