Technical Aspects of Medical Ficiton-Getting it Right....

I recently read a work of medical fiction by a New York Times Best Selling Author. I am a specialist in psychiatry. This book involved a character with a major psychiatric issue. The Best Selling Author is a physician but not a psychiatrist.
In my opinion the technica and l clinical aspects of the psychiatric problem were way off and not accurate.  I looked at the credits and acknowledgements in the book and I saw a mental health person or two, -no physicians.
Now with all that said, does anyone really care? If the general public would not notice, does it really matter? What if you are in the general ballpark of accuracy, it is just fiction right. No one says the technical clinical aspects have to be accurate. Certainly for a NYT Bestseller, it does not matter, if only a specialist in the field would notice.
It bothered me a bit because I think the fiction works with inaccuracies in mental health might not do much to dispel myths and ignorance around mental health issues. Of course with that said , these are works of fiction and the writer has no ethical, moral, or literary obligation to get technical aspects correct, even when the fiction is a real life story and not fantasy or sci-fi or supernatural.
Basically in fiction the writer can do what he or she wants. If it sells, does that mean its good? What do you think?