Here's a personal anecdote when I realized that perhaps "knee medical issues" are not "medical issues" at all:
I was once running and my knee started hurting. I kept running and it kept hurting.
I then saw that the reason my knee kept hurting was because I was using the wrong shoe, or was running not at the right form. After I changed these, the knee didn't hurt no more.
Had I gone to a physiotherapist or an orthopedist, they would've put me into surgery for ACL/MLC reconstruction and 6+ months of therapy so my knee worked again.
I would still be running after the surgery, not understanding why my knee would hurt. I wouldn't have made as much progress in understanding what I actually wanted from my knee.
The reason your assumption doesn't ring true while leto_ii's assumption does is that we have a much, much better understanding of the knee than we do of the human mind, and much more objective tests for knee injuries than for depressive disorders.
So your assumption that you would have been given surgery seems extremely unlikely, while the assumption that a person with depressive symptoms would be prescribed psychiatric treatment rather than being recommended to leave their job seems possible.
For your anecdote, I would expect that you would be given a physical exam and then some kind of imaging investigation before proceeding to surgery. Even if the doctor you went to was incompetent during the physical scan, the imaging would very quickly show whether there is a need for some kind of surgery. Unfortunately, we don't have any equivalent tests for psychiatric problems. If your psychiatrist is incompetent, you may well be prescribed medication that other psychiatrists may have found unnecessary, and your only recourse is to trust your own judgement above theirs (which has its own problems, if you already suspect you have a mental disorder).
Of course, per their story, leto_ii didn't seek professional help, so we can't know what the professional conclusion would have been. Have you ever heard though of psychiatrists recommending job changes to their patients? More so, recommending they leave their job on the spot, without securing another job before hand?
I was once running and my knee started hurting. I kept running and it kept hurting. I then saw that the reason my knee kept hurting was because I was using the wrong shoe, or was running not at the right form. After I changed these, the knee didn't hurt no more.
Had I gone to a physiotherapist or an orthopedist, they would've put me into surgery for ACL/MLC reconstruction and 6+ months of therapy so my knee worked again.
I would still be running after the surgery, not understanding why my knee would hurt. I wouldn't have made as much progress in understanding what I actually wanted from my knee.