HN is a bubble where people listen to what you say even if you argue against them, I haven't found any such place anywhere else before. I've found some people who listen even to people they disagree with on some niche forums, but never a community as big as this with density this high.

Other than listening and arguing in relatively good faith I don't think HN is a bubble, although such people probably have pretty different opinions than the typical person simply because they listen and change themselves more so it gets more refined.