You don't decide what's on topic or the spirit of HN. If anyone does it's Deng, who you're arguing with. Sorry you feel the need to decide what adults can talk about.
"Off-Topic: Most stories about politics, or crime, or sports, or celebrities, unless they're evidence of some interesting new phenomenon. Videos of pratfalls or disasters, or cute animal pictures. If they'd cover it on TV news, it's probably off-topic."
I believe the majority of stories are voted on, and flagged, by the community. If the community decides these are stories worth discussing, I think they fit within the guidelines of HN. Stories about the Russia/Ukraine war also appear. So do stories about US politics. In all of these threads some people complain that they're off-scope, but apparently enough of the community wants to talk about them that they sometimes get upvoted.