Doctors are bad news on scene. They do not know how to work with limited equipment and supplys for the most part. I actually have had to kick more than 1 doctor off my scene. Nurses for the most part are not used to having to identify problems and treating them without discussing with the doctor. But with some slight adjustments in education both could adapt and then yes they would be better for the patients. But with the nurse shortage, the limited funds, and the higher probability for a doctor to get sued, not something that will happen anytime in the near future here in the USA.
And while myself as an EMT-I feel that a Paramedic only ambulance would be best for patients, it will be a long time before, if ever it happens nationwide. Until then all of us need to focus on personal education, take a class, read advanced books, read updated books for our level, etc.
If you plan to remain in EMS work to improve our profession. If you are not planning to work to improve our image as healthcare professionals, get out now, we don't need you or want you.