As I recall, there was an external campaign to politicize this site and I guess to some extend it appears as that has been at least partially successful to me.
So if you have not observed a radical uptick in political/health posts in the last two years, I tip my hat to you. Perhaps I see more of it because I tend to look at "new" rather than the "popular" news.
There wasn't an usual uptick or long-term effect from that call I think. January 2021 was already crazy enough on social media including HN.
HN is much more balanced, if still imperfect.
A few years back the gender activists were complaining about their posts being flagged. Today it is the right wing special snowflakes who complain that we don’t want to take their dog pills, anti-vax spam, and how wounded they are because somebody downvoted a comment. (E.g. we have to not just receive their spam but we have to affirm it.)
I am sure they feel more anguish than they cause us.