In medicine "quality care" is a binary attribute. Something either meets the quality threshold or it doesn't. And as the author found out, physicians do not spend their time researching medications. It's not their job, they're not trained in it, and most of them wouldn't be particularly good at it.

So I'm not sure why you would expect a psychiatrist to do something she's not trained to do to (maybe) increase an already acceptable metric some arbitrarily small amount higher.