> Politics is tribal, so we're talking about something that profoundly undercuts thoughtfulness.
Politics isn't always tribal and many people on HN are capable on thoughtful arguments on politics. HN suffers from the "LKML-effect". Few people can or are interested in following the linux-kernel mailing list, so naturally it only gets attention when Torvalds is screaming at someone. It's the same with politics.
When "diversity in tech" became more popular on the Internet it would get flagged off HN repeatedly. Some stories would get through and thoughtful discussions would start, but people quickly learned (maybe without knowing it) that if you just flame the story it would hit the controversy algorithm. So people would submit more sensationalist stories so it could get more upvotes to counter the flags and flame. Now the level of discussion is set and people don't mind how they express themselves on the topic.
If instead HN would have owned the issue and moderated it heavily it would increasingly have gotten better. People would have learned that flagging or flaming wasn't a good idea and those with more reasoned arguments would formed a critical mass to self moderate comments.
Programming is often tribal, yet there aren't a lot of flame over things like Erlang on HN. Because even if not a lot of people know Erlang, we haven't alienated all the Erlang programmers. So Erlang stories are generally advanced enough to not attract bad arguments and even they would someone would presumably challenge it.
Yes, there are political stories that aren't relevant and/nor thoughtful. But those aren't the stories that could, presumably, be categorized as "fit for HN" anyway. But by just banning entire segments of political but relevant stories is letting the "unthoughtful" people win at the cost of the thoughtful ones.
It might not be relevant enough to fight for discussions about Trump in general. But are we going to avoid to talk about e.g. surveillance, like we always have, just because the president is controversial? That would, if anything, be changing HN.