It might be a regional bias.
For example, I've had friends living in NYC and Boston who are nowhere near politics chat to me about SF local politics, but similar conversations don't occur about Seattle or Charlotte or Cincinnati local politics at the national level. A lot of this is probably also age+class dependent - a lot of the major players in SF city politics are in their 30s-40s and went to the same handful of elite high schools and universities as VCs, IBs, and top SWEs.
> sizable enough vocal group that it enhances the focus that comes from HN’s industry focus
I feel a lot of that is due to the lack of diversity on HN. Like I've seen A LOT of racially biased conversations on this board (and that has turned off other people in my age demographic from perusing HN).