You're describing situational depression. Very different than major depressive disorder or dysthymia for which these drugs are often prescribed. Common mistake.
> Many psychiatrists, by virtue of their education, are part of a class of people who are themselves more prone to depression and anxiety
Yikes, now we're just on to blind speculation.
Not at all. More educated people tend to be more anxious and more depressed.
https://www.originsrecovery.com/wp-content/uploads/2020/10/H...
The fact that we trust those more prone to depression to solve depression should not be discounted.
When it comes to 'dysthymia'. The only reason we find it to be a disease is that we expect people to be happy all the time. We've labeled anything other than that as diseased. As I stated elsewhere, I do not believe in happiness. Most of my day is spent neither sad nor happy. Were I to be sad all the time, I don't think that's particularly interesting either. Our society is not set up with space for people to not be happy. Society is ill, not the people.