There is a big reason why there aren't 20 threads on SDN a week attacking acupuncturists and witch doctors- physicians feel their income is not threatened by them.
If you notice the general stances of the forum, on pretty much any issue they align with the option that would maximize physician income. This is completely/normal and natural, but the problem is when people won't admit that. Its kind of convenient that "whats best for patients" seems to also invariably be "whats best for MD's bank accounts"
I think you're wrong about why there are anti-nursing midlevel posts frequently on SDN. The biggest reason, IMO, that you're seeing a lot of anti-NP/DNP posts these days is simple: many articles are being put out these days where NPs/DNPs are quoted saying that they're equal/superior to physicians and that they deserve equal reimbursements. If voodoo practitioners start doing that, I'm very sure that you'd see just as many anti-voodoo posts on SDN as well. It all comes down to who's being vocal enough to get noticed.
And I doubt that physicians are threatened that they're going to lose income. Even if every single NP/DNP suddenly became fully independent, there's still likely to be more than enough patients to go around. Not only that, if NPs/DNPs start getting reimbursed at the same rate as physicians, who do think patients are going to want to see? The physician with nearly a decade of training or the nursing midlevel with around 2 years (most of which can be done online)? If it's going to cost the patient the same no matter who they see, this is pretty much a no-brainer. So, really, your argument that this comes down to physicians' bank accounts doesn't really make much sense.
A reimbursement cut
might go through, though, if NPs/DNPs everywhere became independent. However, nurses have a ridiculously powerful lobby and they want to be reimbursed as much as physicians are now. So, I have a hard time believing that physicians are acting against nursing midlevels in order to protect their incomes.
Ultimately, it comes down to providing quality medical care. It
is about the patients and not exposing them to the undertrained (and the dangers associated with that). There is not a single study that doesn't have major design flaws (not minor ones) that suggests the care provided by nursing midlevels is equal to that of attending physicians. If such data existed and physicians still were against this movement, then I would be more inclined to agree with you. Until then, I completely disagree with what you've said.