It is certainly strange, and it appears your Doctor is derelict in NOT offering you every possible option for relief.
As far as I know, in my own experiences and from what I've heard from others, surgery is almost always one of three or four options put on the table for a condition like your.
I had a bum right knee the progressively got worse and worse over the period of about a decade. It got to the point that I even had a little limp going on from time to time. Surgery was one of several options IMMEDIATELY after the initial diagnosis. I decided to go for it right away, and from the moment I left the hospital (it was even an out-patient procedure), it's been as good as new. That was over a decade ago. Same with my lower back. Like a lot of people, I got one of those things where my back used to "go out" a few times a year. No matter what I did, I'd be on my *** for three or four days. Surgery, again, was made available but not recommended. I soldered on over the years with the stretching and other remedies, and it's gotten a lot better.
I broke (not fractured, not dislocated, but BROKE) my left shoulder a year ago playing baseball. Again, surgery was one of the options, but I deferred and it healed pretty good using another remedy.
This "Doctor" of yours must have SOMEONE that he answers to, especially if he works in a clinic, hospital, or HMO controlled entity. Even if he has his own private practice, he's still accountable to the AMA and the Federal, State or local government oversight bodies. I'd go over his head (if you are indeed stuck with this guy and this guy only because of your insurance) at the very least. I'd be more concerned about my bum knee than I would about his reaction or anger due to my "turning him in" or going over his head.
He took some kind of oath at some point to do everything in his arsenal to provide health and relief to his patience, and it appears that he's either too lazy, not interested, or just going through the "doctor" motions to get his dough and go golfing...................