This is gradually changing as we see new studies emerging with the relaxation of regulation. However, the picture the data paint is still quite limited compared to the wealth of personal experiences that have been recorded over the decades.
Ideally, reading new research should be part and parcel to everybody's professional career, but a ton of the advice that you'll receive from your doctor will be informed more by experience (compounding anecdote) than anything else.
Doctors are like engineers. There is a body of science and research for their field. They were once trained on part of it. But day to day each individual doctor is a practitioners. What they say is often just their own anecdotes. Research on a topic may exist but it's up to personal interest and work style whether they read it.
Human health and biology is far more complex and tricky that whatever engineers deal with.
Getting off SSRIs, changing my work situation and enjoying some LSD made a much bigger positive difference than endless sweaty nights on Prozac ever did.
And avoid personal anecdote, they have little value compared to what a doctor says.
Thanks in advance.