people don't understand how much of what they read on reddit is actively managed by people who want the message controlled. This is the same for any popular social media site with twitter being the top of the heap
just be glad that HN isn't that important to where the issue becomes observable (we get enough indirect political tripe as it is with submissions)
Even if HN were bigger, it wouldn't be worth the attention of PACs and other activists IMO, the HN crowd is not their voter base. For Republicans the tech crowd is too diverse and immigration-friendly, for Democrats... I'd bet a case of beer that many/most of the US people here vote Democrat anyway since the actions of most Republicans run completely against the needs of tech people.
Also I think dang (and whoever else) is a good mod, which makes a lot of difference.
There's also a recency bias, I've been on Reddit for 8 years and HN for ~3. Maybe my disillusionment has yet to come.
Now I'm not trying to disavow HN, it's a really cool place and there are a lot of knowledgable people here with lifetimes of experience in complex subjects but there are also a lot of technical topics where the discourse is clearly inferior to reddit, twitter or even discord.