I don't think there's anything inherently wrong with a private practice specialist to hire one or two NPs to work under their supervision and deal with the bread and butter cases that you, as the main physician, are sick of seeing. You increase your patient load with them and you don't get bored with your speciality.
The issue is when state orgs/govs start allowing midlevels to practice independently, regardless of the speciality. Idc if it's FM or ortho, (I've seen some great NPs in ortho clinics taking off casts etc), but they should be working under the supervision of a physician. The lobbying should be directed at that.
On a related, but side note, another thing we should be pushing for on a regulation front, is to limit the online NP programs that pump out NP degrees for RNs after one year of working as an RN. NPs should be nurses who have been nurses for years, decades even. I have many friends from HS that went to nursing school and upon graduation, they immediately enroll in an online NP program. That's a simple degree mill that is oversaturating the market and allowing hospital orgs and state regulators to say, "well, we have so many new NPs, we can hire them for much cheaper, lets do it".
I really do think there is a valuable place for midlevels (preferably PAs>>>NPs), but this push for full autonomy is dangerous. This is probably one of the biggest reasons for physicians and residents alike to organize nationally.