Just pragmatically speaking is why. The pragmatic side in me sees that nobody is stepping up to band together and do something about it, the only way I see this getting done(in the short term) is some sort of police/national guard/feds coming in.
I think incrementally people WILL learn from this and start to do better in the medium to long term, whether the medium term is a few decades to long term being hundreds of years.
RE: Seattle's CHAZ/CHOP had it's first mass shooting last night. One dead and one critically injured.