Given bounded resources, there might always be a "shortage of EMTs". Some rural places for example don't have the funds to even support one (and an a couple of emergency situations can peak demand even in bigger cities).
The shortage might be at the root of the problem, but it also might be unavoidable. It's not always a given that a shortage can be fixed (or when it will be fixed). And given a shortage, people who call ambulances for no reason (which very much exist) make things worse.
The shortage might be at the root of the problem, but it also might be unavoidable. It's not always a given that a shortage can be fixed (or when it will be fixed). And given a shortage, people who call ambulances for no reason (which very much exist) make things worse.