I'm sure that would save a lot of lives. An ambulatory medical service, if you will.
I once dislocated my shoulder while on a large trampoline and was unable to get up from my hands and knees due to the intense pain whenever the trampoline wobbled. The ambulance was redirected to more serious injuries three times. I was stuck in that position waiting for two hours before it arrived.
In that scenario it would also be appropriate to wait for a driver to sober up before driving you to the hospital if neither ambulance nor taxi were available (or delayed). One glass of wine would be out of most people's systems after two hours.
Thus poking hole in the "drunk drive someone to the hospital" argument, which is what this was all about in the first place.
In my previous comment I just meant that sometimes ambulances can take a good while and a taxi might not.
In the unfortunate case of the trampoline there were several sober people with driver's license and cars available and a taxi would have been there immediately.
Unfortunately,they failed to get me out of there, meaning I still had to wait until an ambulance was available. It was beyond painful and exhausting both physically and mentally. But it was still technically not an emergency.