science

The point I'm getting at is this: When a certain percentage of the population is diagnosed with a disorder, you have to ask whether we've started diagnosing ordinary human existence as a disease.

Its pretty mich a known fact that autism and ADHD were a somewhat beneficial trait in our hunting and gathering era. Hypervigilance makes you really good at spotting prey or predators and unsatisfied curiosity pretty mich forces innovation over a long enough time. The side effects that make life aliving hell in modern society weren't nearly as detrimental back then. People lived in more communal small tribes and being a bit weird didn't mean you get cast out and left to die alone.

Over time it became less and less useful. When the industrial revolution came along and everyone was supposed to let go of their individuality to instead work 12+ hour shifts pretty much only the negatives prevailed.

So yes, we are diagnosing a normal part of human existence as a disorder because in today's society it is one. Mind you, its not diagnosed as an illness, something with a cause and potentially a treatment, its specifically diagnosed as a disorder, something that disrupts normal physical or mental function. It doesn't really matter which genetic marker is the reason for your specific case of serotonin deficite that leads to the inability to concentrate and keeps your brain on 120% to compensate. The symptoms and their treatment are the same either way.