When you live in a city with lots of crime and there's a shooting in the parking lot of the school at one in the morning, it's not really something that needs an urgent text from the kids.
No, they are not such an emergency that my kid needs to be taking time from class to text me about it.
Most schools in areas with lots of crime or gang activity have metal detectors and other security at the doors. Violence is happening off hours, or between gang members either off campus (but close enough to warrant bringing people inside) or at the edges.
In a country with hundreds of millions of people, a thousand over four years is not exactly a rounding error given that it is concentrated in a few areas, but still close enough that the vast majority will never experience it in their lives.
this is a good thing I can talk to my kid about… there’s this Earth and on this Earth there is this Country where based on number of people that live there vast majority will not experience being gunned down in what should be 2nd safest place you can be. no other country on Earth has these issues, even ones that are 5x+ size of this one. But you know, statistically speaking you should technically be OK…