People want to talk about crime, drugs & homelessness all the time. It is only in high profile cases where the issues seem topical, that HN can't discourage discussion around them.
> quasi-apocalyptic worldview re: some American cities
I don't see why speaking out about lack of police enforcement is seen as 'quasi-apocalyptic'.
> despite all available data contradicting that worldview
All available data is in favor of those speaking out about crime & drugs in west coast cities. Additionally, the eye test seems to portray a situation that's more dire than even the data might suggest. (underreporting, catch & release).