As someone who is in the "bidness," I can say that there is a great deal of over-pathologizing in the medical and mental health community of "symptoms" or diagnostic criteria. Sloppy science.
I see this, in particular, with ASD, ADHD and mood disorders.
...and then you see a 12 year old that is on a mood stabilizer, a stimulant, two anti-psychotics, and a sedative to sleep at night. Crazy business.