I am going to play police advocate here. How do they know it is a false call until they investigate?
I would guess a vast majority of 911 calls aren’t false.
If someone calls 911 hearing a scream from the neighbors house, it could be a false call to harass a neighbor, but, it could be that a neighbor fell, there was a home invasion or something else.
It seems as someone in a public safety position, the first and fast priority would be to check on where the report came from, not do who knows how many hours of investigation required to try to determine if it is a fake call.
One night about 20 years ago my wife and I went out to a function and left two of our daughters home alone for about two hours. One was in her early teens and the other was around 9. One of them called 911 while we were gone but then hung up. Because it was snowing we were able to confirm their story that the cops showed up was true due to footprints in the snow around the house.
They said the cops showed up and the girls hid and acted like nobody was home, so the cops left. We probably dodged a DSHS bullet on that one.