Sometimes generalizations are accurate (in general😉 ).
Having seen both sides, I can tell you that it does not surprise me one bit that they missed these injuries. The education is simply not there. Those diagnoses require baseline knowledge of anatomy that is lacking at most (every?) NP program. From my personal experience, the NP curriculum requires about the same level of anatomy as you get at a AP A&P class in HS, or what you can get a community college (like for nurses, EMTs, barbers, etc). You cannot diagnose an AC separation if you don't know what the AC joint is. You cannot accurately diagnose neuro injuries if you have essentially no knowledge of the brain.
This is the problem that I have with NPs and autonomous practice. The education is not even close to what a physician gets. I cannot begin to illustrate this enough. Imagine only taking one semester total of your 1st and 2nd year followed by one semester of your 3rd and 4th and then being allowed to see patients by yourself and write prescriptions with essentially no oversight. Think I'm exaggerating?
Again, I think there is a place for NPs. I think NPs can eventually learn a niche area of medicine, excuse me "advanced practice nursing", pretty well (i.e. ortho). They can be useful in routine tasks and in patient education. The problem is they do not have close to the same level of baseline education to be making independent clinical decisions.
Argue away but until you've done both you argument is all conjecture. Every midlevel I know that later went to medical school will tell you they are amazed and frightened about how little they knew and how much they thought they did.
(BTW, I do not feel this way about most PAs and I have no real problem with the pods or most other fields)