I don't think your avg pain physician has 1/10th the surgical skills of a good NS or spine surgeon, and a ton of these shiny new toys pain doctors are trying to roll out are BS.
Half the time you're listening to a KOL, you're listening to someone with financial interests in whatever device you're being convinced to bring into your practice, and after you've done 15-20 cases with BS results you've discarded that treatment anyways. This leads to pain doctors flubbing around with new devices they're not skilled enough with to be good at, and those pts following up with a surgeon to remove it.
You're not learning a lot these skills in fellowship; you're learning it in real time on real pts who follow up with other doctors when your toy doesn't work.
I do think there are a lot of neat amd effective tricks up our sleeves, but we are not spine surgeons.