It's Musk. Rather obviously they're going to try avoiding alienating him as much as possible.
Some of it is Musk fanboys and Trump shills and Russian political operatives and such. I'm sure some of that is going on.
But some of it is just regular HN users who are sick and tired of political stories. There have been a huge increase in political stories in the past three months. And even if some of the stories are interesting, to some people, the second story in 12 hours isn't interesting, and the third similar story this week also isn't interesting.
Some people are here instead of Reddit for a reason. They don't want HN to turn into Reddit. So they tend to flag political (or politics-adjacent) stories, unless they are directly tech-relevant - and maybe even then.
I don't flag these stories, but I do think this "fight" is one we'll eventually lose. The majority of users here want to use HN as another Reddit. They don't really care about what made HN different. As such I think it's time for us to accept the new normal. Our party is over.