And what if it breaks? You can't really have only one ambulance either way.

But even then, OK, you could argue that in some specific scenarios you need an ICE ambulance. That does not mean that ambulances can't be EV.

In the extremely contrived example where two calls come in back to back from locations that are 400 miles apart, the need to charge an EV in the middle of driving for 6 hours straight is going to be a pretty minor factor.

Lol maybe take a look at Canada where towns are 100km apart and an ambulance can potentially be driving constantly on an 8 hour shift. Not to mention the Fact they have huge alternators on them to power all the medical stuff.