I think doctors aggravate this problem of people believing they're ill even when the clinical evidence doesn't support it. I can't tell you how many doctors I've had tell me, explicitly, within 15 minutes of having met me that they know my body, symptoms, and experience better than I do. It used to come much later in the process, after I'd spent months following their instructions to the letter and having my symptoms…
But on the flip side of this, you don't know your internal workings better than they do. Just because you live in your body doesn't mean you know how it works. I drive a Civic, it doesn't make me a mechanic. Diagnosis is tricky. Especially in a system as complicated and interconnected as the human body. People often have a bad tendency to misattribute effects to recent events. And let's say your conjecture of why the…
But thinking this over that’s a false dichotomy, even if your doctors have exhausted their theories it doesn’t mean that some other doctor might not have an idea or there’s some variation on one of the existing theories that might explain things.
Likewise, even if an exact diagnosis is found, few treatments are 100% effective in all cases, and most diagnosis have special cases which complicate things in sometimes baffling ways.
Realistically, people usually need to both address symptoms directly and seek underlying causes to some degree when dealing with illness. That exact degree depends on the exact situation but it’s typically not 0% in either case.
I would add something else, ultimately, especially with vague complicated symptoms which occur both in firmly physiological and firmly psychological disorders, the primary goal is typically to return function to ones life. Whether or not the mechanism to do so is real or not is of secondary importance especially if it doesn’t cause much harm relative to its benefit (which is not a simple matter to evaluate in cases like long term antibiotics for chronic pain, but I think is easier to evaluate for things like exercise (it might not cure the underlying cause, but it is likely to be indirectly helpful and unlikely to harmful so…))