Objectively, medical students, by the end of 3rd year, have more basic science training and several times the number of clinical hours of training than any NP/DNP program in the US currently offers. I've commented on this issue many times before and, if you'd like, I can PM you my side-by-side comparison of NP curricula with that of med school curricula.
Additionally, more and more evidence is coming out that prior experience as an RN (before pursuing an NP/DNP) is not as useful/significant as people originally thought -- this kind of confirms what many of us have thought: that working as a nurse doesn't automatically equate to thinking through a patient issue in a medical manner to come up with a differential. In fact, if you browse nursing message boards, a lot of nurses these days are using this as a way to justify direct-entry programs (where you become an NP/DNP within a few years with no prior healthcare experience at all -- the number of clinical hours of training required range from 500 - 1000ish and many programs do not provide preceptors; rather, they require the students to seek out preceptors themselves, thus providing clinical training of questionable quality). With all this being said, my question is, if you don't trust a newly-minted M4 to make any critical decisions, why do you think it's okay for someone with less training to do so?
Now, I realize you mentioned experienced NPs (by which, I'm assuming you mean those who have been practicing in a particular field for a number of years already), but the problem is, as far as I can tell, there's really nothing distinguishing the scope of practice between an experienced and a newly-graduated NP. Please feel free to correct me if I'm wrong. My personal opinion is that it's better to hire and work with PAs, who not only receive superior training compared to nursing midlevels, but also work together with physicians rather than claiming equivalence and fighting for independence.
Also, just wanted to clarify that I don't have anything against PAs. I think their curriculum is what NPs/DNPs should aspire to instead of focusing so much on nursing theory and other fluff courses that offer little clinical utility. If you're training to be a better clinician, your education should emphasize things like clinical utility, more clinical hours of training, etc. Not how to run a business or how to conduct research or how to influence health policy.