There are many places that I didn’t mention. And I did forget HN, to be honest. But you’re right — what I said applies to any long form and/or thoughtful/useful content, even on HN.
I've seen similar discussions about Stack Overflow as well. At one time people really welcomed comments being posted on there but some people have since become a little jaded due to how strictly moderated that site is. While it keeps the place in order, it does also mean anyone who might disagree with a moderators decision - even when they have genuinely thoughtful content to post - is left out from the community.
One day people might say something equivalent about HN. So your points are valid about HN if just at a theoretical level.
It’s not just valid theoretically. There is a cognitive bias on HN in certain hot button topics including psychiatry, addiction, and Facebook. Dissenting opinions there run the risk of getting you trolled and flagged under dubious pretenses.
Overall the moderation system here works better than any other I’ve seen on the internet, but like any organization of humans there are some dysfunctional areas where power prevails over logic.
One day people might say something equivalent about HN. So your points are valid about HN if just at a theoretical level.