"What I have witnessed all too often is that admissible HN opinion talk stops at "what makes a computer program well-constructed", and very rarely considers "how might computer programs cause harm to their users and to society". Often times when people say "hey maybe that use of technology is harmful to [group of people not well-repesented on HN]", that discussion is immediately downvoted into oblivion."

Could you cite some specific HN submissions where you've observed this behavior? I honestly cannot recall a single one.