I think diagnosis is mostly made up jargon that doesn’t capture the complexity of the human experience. It is designed to itemize the human experience for bureaucratic consumption. Autism diagnosis gives access to school resources whereas weird child that prefers their own thoughts does not. Schizophrenia lets you lock up people with antisocial beliefs. ADHD lets you medicate away the natural hyperactivity of 7 year olds. Diagnosis is a form of societal control. This is different from modern schema therapy and cognitive behavioural therapy which focus on the individual experiences a person has such as their actions and thought patterns that allows them to disentangle themselves from patterns of behavior that harm them such as paranoid delusions, alcoholism, unhealthy sex, etc. but those things require lots of one on one work with a therapist.