While I appreciate your frustrations, and sympathize with being in limbo, there are at least three flaws in your theory:
1. Not all symptoms ARE treatable. Many of the sensation things, like numbness, tingling, buzzing sensations -- don't always respond to treatment.
2. And without knowing the CAUSE of the symptom, the doctor is reluctant to treat it, because a medicine that might treat the symptom of one disease might do you great harm if you have something else wrong, causing the same symptom.
3. Treating symptoms without knowing the cause can hide that symptom, and it might be the very thing that the doctor needs to observe -- over time -- to determine what is the cause of your problems. If you hide it with drugs or some other treatment..then it delays the diagnosis process.
Running to doctor after doctor may SEEM reasonable...but every time you do that, remember that you'll have to "start fresh" -- the doctor will look at you as a "new patient", start all the testing all over again, and delay the diagnosis, in the long run.
Staying with ONE doctor-- and reporting that symptoms are continuing, or worsening, or new things are appearing --
reporting it by calling regularly and often, or making an appointment, or writing/faxing/e-mailing
will serve you MUCH better in the long run than doctor-shopping.