Hi, I wrote the post! I'm actually very grateful to my neurologist who gave me my idiopathic diagnosis, because he was the only doctor to figure out the mechanism of action. He's been enormously helpful.
It doesn't change the fact that, as a patient, an idiopathic diagnosis is not a satisfying outcome if it doesn't point to a course of treatment. And it's certainly not something I view as a "final diagnosis" -- I'm patient, and technology and medicine are still improving and I hope it'll be possible to identify the cause and treat it in the future.
As a fellow patient -- accepting that sometimes life is uncontrollable can bring a lot of peace. Even if there is no treatment, acceptance does a lot for happiness.
Nonetheless, know that your post is appreciated. For now it's mostly handling small fasteners that gets me, typing is usually mostly okay. But since I do hardware prototyping I had to learn to ask for help a lot more than I was used to.
I also find it's sometimes helpful to wear a cloth around the more painful hand to kind of remind people that the pain isn't obvious... well, plus if it's a little wet it helps the pain a lot so it's functional too. But invisible pain means my coworkers frequently assume I'm feeling about how they are. And I feel bad saying no to stuff since technically I can still do it... it's just painful to do.
It doesn't change the fact that, as a patient, an idiopathic diagnosis is not a satisfying outcome if it doesn't point to a course of treatment. And it's certainly not something I view as a "final diagnosis" -- I'm patient, and technology and medicine are still improving and I hope it'll be possible to identify the cause and treat it in the future.