I think the point was bang for the buck with doctors having to shell out a whole lot more than nurses and therefore having to take longer to break even.
A lot depends on the individual doctor/nurse. I've worked with doctors who completely clean the patient up after a delivery and others that can't wait to get out of the room.
I've worked with some doctors who wouldn't appreciate any nurse no matter what and others who know the nurse is the one who sees the patient for an entire shift and can save their butt.
The wise doctor steps up and takes time to help the nurses understand the real pathophysiology behind a diagnosis and what labs and meds would be needed and what to look for in results/reactions. That doctor knows that educated nurses can alert the doctor post haste instead of waiting around for him/her to find out when he/she makes rounds. Then there are doctors who think they are better than the nurse/patient/family and keep their knowledge to themselves. That doesn't really help anyone but the doctor's own ego.
I've worked with doctors (and nurses for that matter) who are careful and on the ball who really know their stuff and others who I wonder how they ever got into med school, let alone got their degree and passed the boards.
A lot depends on what floor the nurse is working on. A specialty unit (L/D, OR, CCU, ICU, NICU) usually have better relationships/respect between doctors and nurses than a general floor where the doctor typically comes in, makes rounds and is gone before you know it.
I agree with Paris, it's WAY harder to get into med school. Just applying can be a financial drain for some as you really need to apply to ALOT of schools and you have to have a bachelor's first. An RN can be had with an associate's degree.