Here in New York City, the majority of EMS calls do not need the NYPD on the scene with us. Admittedly taken out of context, but would not having, in no particular order, a combination of proper medical training for the personnel, driving techniques for the vehicle operator, and the lights and siren available for use by that trained vehicle operator, instead of delaying transport awaiting a LEO vehicle fot it's Lights and Siren, be a better thing?
I think I have the correct paraphrased quote, applicable here, from Theodore Roosevelt, that one can get better results with a carrot and big stick, than just the carrot.
Also, while I don't believe I know you, I have to think you've never seen any Emergency vehicles being operated in Emergent mode in New York City, especially on the city's highways. Too many times, I have seen drivers almost in collisions, and actually colliding, trying to force or bluff their way through the traffic, by trying to appear that they are convoying with the ambulance.
I'll reopen some of my old strings re vehicles following ambulances, and the dangers of Emergency vehicles convoying under L&S, in the near future.