[cja]

Professional assessors should know much more about the condition for which they are assessing and its signs than any one person who may or may not have the condition. A professional should also know the other conditions with similar symptoms.

I learned about ADHD for six months until I first consulted an expert about the possibility of my having it. He was able to recognise symptoms in me that I hadn't noticed.

[odyssey7]

Glad you got a good provider, but that’s anecdata. You kind of acknowledge this with the word choice “should.”

As the old joke goes, “what do you call the person who graduated last in their medical school class?”

One estimate [1] states that over 400,000 people die due to medical errors in the US every year.

[1] https://pubmed.ncbi.nlm.nih.gov/23860193/