Psychiatric diagnoses are imperfect, sketchy theories about how 
people's minds can give them trouble. ...The great intellectual 
challenge of clinical psychology is to integrate knowledge about 
reasons and people with knowledge about causes and mechanisms. We 
should avoid relying solely on diagnostic information, but we 
shouldn't discard it altogether.

https://aeon.co/ideas/a-psychiatric-diagnosis-can-be-more-than-an-unkind-label

www.peoplewho.org