Maybe Nurse Practitioners are more prepared for the stress of practicing as newbies?
I think back to being a new nurse, having little frame of reference for clinical judgement, pathophysiology, medications, and technique for nursing procedures (IV's working the pump, placing ng tubes and catheters, etc). Not saying I wasn't educated, but working through that lack of experience is not unfamiliar ground for new grad NP's. So in a sense, we may be more prepared than new MD's and DO's. We may have more skills with troubleshooting, researching, and asking for help.
The role is certainly different than registered nursing, and it would be helpful if there was more of a structured entry into practice across the board. At least some sort of mentorship program with another health professional would be valuable,and would hopefully make it a safer situation for patients.