If there's one critique that I believe is paramount it's that HN has, due to its readership, an ethical obligation that goes beyond making discussions all nice and civil.
Political issues are obviously divisive and it's perfectly fine to keep stuff like the El Paso massacre of the front page. But when hot-button issues intersect with technology, the HN readership is in a position of power, and shouldn't routinely be spared the anguish of being reminded of their responsibility.
Yes, articles about, for example, discriminatory ML do often make it to the front page. But in my impression, that topic (as well as employment discrimination, culture-wars-adjacent scandals in tech academia etc) are far more likely to be quickly flagged into oblivion than similarly political takes that just happen to be in line with HN's prevailing attitude (e.g. cloudflare-shouldnt-ban-<x>).
The article impressively articulates what toll divisiveness takes on the moderators: Even if I read the same ugly comments, I am unlikely to experience the sharpness of emotion that apparently comes with considering the community one's baby, and making it's failures one's own. When such divisiveness is then reflected in the "real world" of mass media, the pressure only increases.
But as this article shows, abdicating the responsibility by keeping the topics sterile is similarly suspect, in the sense of fiddling while Rome burns. I believe a willingness to confront the ugly sides of technology with some courage of conviction would eventually be recognised, even if it may occasionally involve a bit of a mess.
Funny, I thought HN's prevailing attitude in the case of the recent ban of 8chan was, hell yeah, good riddance to those reprehensible twats. (Which, personally, annoyed me, because I believe that even the deplored should have a space for communication.)
If you instead think of a forum thread as an airing of opinions - a chance to find out what is the range of perspectives on the topic that exist in the community, and be exposed to nuances you wouldn’t have thought of on your own, the exercise takes on a different tone. People who came to that thread thinking that it’s obviously a good thing are exposed to arguments that disagree, and vice versa; maybe some people are persuaded to shift their viewpoint, or maybe not, but everybody learns that a topic that they might have assumed was uncontroversial is actually one on which reasonable people might disagree.
It can be jarring for the nerd-inclined to accept that just because they have arrived at their opinions through, obviously, clear rational analysis of facts, that does not mean that everybody else, when presented with the same facts, will necessarily reach the same opinion. The illusion that you can read an HN thread and say ‘well, the pro arguments seemed more coherent and got more upvotes than the anti ones, so presumably the community consensus is pro’ ignores the fact that the anti arguments were also made by members of the HN community, and we’re not bound by collective decision making. You are allowed to read the thread and adjust your own priors and come to your own conclusions, having hopefully been exposed to some perspectives you might otherwise have missed.