I’m not sure how to apply this here. What does optimizing for regular daily use and not black swan events look like when it comes to fire and ambulance services

I’m not sure how to apply this here. What does optimizing for regular daily use and not black swan events look like when it comes to fire and ambulance services? It seems to me that black swans are a major purpose for them. That’s why the local fire station tends to have a lot of time where the firefighters are sitting around, and why simple calls often get 3x more response than they need. The services are greatly overprovisioned for daily needs because they also exist for the times when an entire apartment building burns down, or some maniac bombs the subway.