I want to say this as respectfully as I can, but it isn't easy: the quality of discourse on these topics is really low on HN. At the same time I do think it's really important for them to be discussed. Time and again, though, I'm disappointed by how reductive and unmeditative these discussions are. I'm also surprised by how angry people seem. This is a site used by a lot of very smart people, but I think there is an…
In the past, I've valued HN as source of uncommonly good discussion. I still feel that way about how pure-tech topics are handled here, and I think HN remains better than 90% of other discussion fora for politics. (Twitter, anyone?) But "better than 90% of alternatives" is completely compatible with "reductive, vicious, and uninformed".
A particular frustration of mine: the scattering of dialogue across multiple comment trees over multiple posts. There are snippets of quality discussion, but they're broken across ~8 different posts. There's no particular way to find them when they're not highly voted, or keep the quality high after they become popular.
Meanwhile every single post has multiple instances of "The original essay is clearly inaccurate, so..." "Sources?" (Or conversely: "Is clearly backed by science, so..." "Sources?") I'm not sure either person in the exchange is behaving badly - the first person wants to make a conditional point without litigating the condition, the second person doesn't want to concede something uncited as objective fact. But the result is that every post is full of horrible, discussion derailing fights over whatever sources two random people can throw at each other.
However one feels about a given exchange, it ought to be fairly obvious that replaying the dispute fifty times with varying sources and no acknowledgement of the other instances is a terrible way to make any kind of progress.
I don't know what can be done about it within the HN format, though.