I did not know this. The ambulance situation is a shambles and wildly differs from state to state and in what your health insurance provider (if you have one) may not make you aware of. The article includes a comparison of all states’ ambulance services.
If it’s a false alarms you get billed by fire rescue Victoria. This is normally when it’s a fire alarm system but can be when someone calls.
I’d argue that a fire is relevant to whole community where as medical is just for that person. Obviously this is dependant on the situation and the fire departments do take that into account.