So in theory, people here may be "free speech absolutists", but in practice, we enjoy the environment that the moderation here enables. At some level, we know via experience that free speech absolutism is not where we want to live.
And yet, the "censorship" has a pretty light touch. It doesn't censor for viewpoint (in the ideal), but for false or misleading comments, or for personal attacks. (Yes, I know, HN doesn't always live up to that ideal.)
It could be that HN's theory is coming around into alignment with it's practice. We're seeing in the wider world that free speech absolutism can cause problems, and that heavy-handed censorship also causes problems. Speaking broadly, what HN is realizing is that we want a wider world that is more HN-like.