You could take an online quiz and guess if you are Autistic. You could have your family doctor read you ten symptom questions and hand you pills. Or you go to a very busy psychiatrist. The doctor spends ten minutes with you and says: “I think you have ADD.”
This busy doctor prescribes you medication. You take the medication for a few months and then discontinues it due to side effects. Deep down, you’re frustrated and not sure if you really have ADHD. Years and months pass, but the problems persist.