I have to agree with this. Before I have to exhaust all the medical resources, in my mind, when people get sick, they go see a doctor, the doctor prescribes medicine, and medicine fixes problems. But in reality we're still largely relying on our own defense, e.g. COVID. We rarely have a drug that directly fixes our problem.
I started having really bad insomnia more than a year ago. I went to see a bunch of doctors. Initially, I was given low dosage sleeping pills, which didn't help much. I went to a hospital to get a CT scan because I was having mad headaches, which my family doctor wouldn't refer me. The scan was normal. Finally, I found a doctor who's willing to refer me MRI scan. After waiting for couple of months, the result didn't turn up anything again. Keep in mind I've been suffering 2 - 3 hours sleep a day all these time. I also did sleep study, and sleep study mostly care about sleep apnea, so they couldn't identify any causes again. Then I went to see a psychiatrist, more sleeping pills, which are really antidepressants. Eventually, after a long wait, I was referred to a neurologist and sleep specialist. I've done so much research on sleep medicine at this point, I already knew what he's gonna prescribe me - sleep restriction therapy. That didn't really help altho I gave up after trying for two weeks. I intend to try it again but I can't attempt it now that I'm back to work. So one year later, I'm still messed up with no known cause.
I know insomnia in my case is not a traditional disease, but it goes to show you that if you're not having one of the common diseases then you're shit out of luck.
The human body's extremely complex, but instead of using proper debugging tools, doctors are mostly relying on "console logs" or "print statements". Even if a root cause is identified, often time we don't have the necessary tools to fix the problems.