Scroll to the bottom of comment sections on HN, you’ll find the kind of low-effort drive-by comments that are usually at the top of Reddit comment sections.
We have people from every political spectrum here and they don't get banned, how can it be an echo chamber?
We have communists, free market absolutists and so on all arguing in the same comment section. I don't think I have seen any thread with many comments where both (or more) sides weren't represented.
Scroll to the bottom of comment sections on HN, you’ll find the kind of low-effort drive-by comments that are usually at the top of Reddit comment sections.
In other words, it helps to have real moderators.