When I did a ride a long with the German Police back in the early 80's, (At the time the police I rode with were part of the German government), they were barred from providing medical assistance to victims of serious car collisions, as the government had been sued many times over injuries, being made worse, by officers not having "advanced" medical training. So the government simply barred officers from providing medical assistance, rather you had to wait until EMS arrived. Back then the EMS, were unlike our modern day paramedics. Instead they were more like cab transports with lights and sirens, they literally pulled up, put you on a stretcher, and then sped off for the local hospital. No real triage etc, just get you to hospital as fast as possible.
As for the, comment give me a siren and a flashing lights, so "I can go as fast as possible" that simply isn't the case. Volunteer fire fighters when responding to the hall for a call, are restricted to 10 km/h over the posted limit under the HTA, here in Ontario.