The PTM won't allow you to change the dosage yourself, though, like he said, right? The actual dosage would stay the same and it would give you the ability to administer bolus doses? Because if that is the case, I really don't see why he wouldn't be ok with that
I've never had a pain pump, but I did have an epidural infusion pump for 6 weeks at home so I am familiar with what your talking about. I was able to give myself a bolus dose when I needed it, which was very helpful sometimes. I think it was 1 mg every 30 minutes and then later was changed to 2 mg every 45 minutes. I certainly didn't use it constantly. In fact, my doctor would even advocate for me to press the bolus button right before and then again during physical therapy so that I could have that extra amount to get through it easier.
It sounds like other features of the PTM, like knowing the dates of your refills, would be very beneficial to you as well and completely harmless. Maybe you should try to get a second opinion from another doctor, at least, if yours is dead set on not letting you have this. It also comes down to, I think, how much of an attachment you have to your doctor and if you are willing to leave him and see someone else if it comes down to that.
Good luck!