Now, I actually agree with your statements that it is not fair (and is even harmful to the cause) to suggest that doctors are smarter than nurses, regardless of whether or not it is true on average. However, I do not think you can reasonably draw the conclusion that a MD/DO cannot do the job of a RN. I have the utmost respect for nurses, have several in my family (including my mother and have no physicians in my family), and worked as a nursing assistant for three years as an undergrad so I have plenty of exposure to the field outside of a physician role and I think your argument needs a slight adjustment.
While a nurse is certainly better at completing the job of a nurse than a physician is, there is nothing about a nurse's job that a physician would be unable to do (but the reverse is not true). It is not unreasonable to say that a physician can do the job of a nurse. It is unreasonable to say that a physician can do the job of a nurse better or even at the same competency as a well-trained nurse.
Your response if fair, but I would like to clarify in return. I understand that this thread is not intended to be against the bread and butter RN. However, as an RN who WANTED to be sympathetic to the argument and the thread and who agrees with many of the points, I saw a lot of creep of the language I have heard about RNs into language about NPs and PAs (especially NPs). That language and argument is equally damaging in that context. Many people commented about the power of lobbies and whose voices are listened to or heard. It can be valuable to have a reality and tone check, and that is what I was attempting to provide.
Now regarding your other quibble, which we both realize is outside the scope of the larger discussion:
Can a physician do the job of a nurse?? If you worked as a nursing assistant, you are probably more prepared than most, because, at minimum you have skill at moving and caring for people most docs don't. I teach CNA students, so I know what it takes to learn it. It is not my argument that a physician could not do the job of a nurse with the appropriate supplemental training and experience. (Though frankly the same is true of nurses becoming doctors which is the point of nurses going to med school). It is not my argument that there are no physicians trained and experienced in many of the things nurses may excel in, but the majority are not and are not expected to be. I have been in many situations where I have been working one on one with physicians on a typically nursing problem and I am asked to lead the encounter because it is more clearly in my training and experience, not theirs. And I am not talking about IVs (which, frankly, you are probably as good at as I am).
Some actual examples. How many physicians (think percentages here, from medical training, not I know one guy who.....) do you know who could do a really good job of teaching a family to care for a bedbound patient, including a full suite of non pharmacological pain relief, because that person wants to be alert? To be good at teaching that, you have to have done it, and have to have done it a lot. Most physicians don't. Could they learn, sure, and so can the lay family member, but not in a day or 2.
How many typical MDs (outside of urology) are experienced with difficult catheterizations? Can they learn, sure. How long would it take?
How many physicians (outside of vascular surgeons and some ID docs) are truly skilled in wound care, including selecting the appropriate dressings for a given situation, applying and managing wound vac dressings? I have spent years on this and it took a long time to get good at it. It took a while to get minimally competent at it. Can you learn it? Sure. I could teach you. How much time can you give me?
Other nurses in other specialties will have different examples than I have. I couldn't do their jobs without a lot of time in, even though we start off with more similar training.
And then there is simply the skill that any professional develops in managing the workflow of their job. It takes a while to get competent (often months not days for competence, years for excellence). Meds at the right time, IVs, transfering, toileting, teaching, etc. Is is learnable? Sure, but how long would it take to get to do it at a level that patients won't suffer?
No one honest says that doctors can't learn to be nurses, or visa versa. No one honest says that some doctors or nurses shouldn't, because frankly, they would suck at it. The difference of opinion is in what it takes to learn those skills and what expertise represents. You know what that looks like for docs. Frankly, you don't for nurses. There is no reason you should. The only error is in assuming you know, when you don't.