Yes, cops will jump right on someone getting slapped. That definitely sounds like reality. Good call.

Do you guys ever like, go outside?

Plenty of places in the US are not large dense urban cities, and the cops will absolutely respond to a battery call. Like every time.

Plenty of places this would be the most interesting call of the day for a police force and you'd have 5 squad cars show up.

Other places won't even bother responding to the call. Your mileage will greatly vary.