When you need somebody, not just anybody, to extinguish the flames engulfing your car
Sometimes the police are necessary. I remember back in college I had some neighbors who threw a screaming kegger / vomit party every night of the week. They asked me to simply come over and tell them if they were being too loud. One time they savagely killed a goat. I found the police to be a better option. They will come over any time day or night, with guns, and tell the neighbors to be quiet. It’s a pretty good deal, needless to say. That so many police substations are memorials to fallen officers is worth noting and appreciating.