First of all I want to thank you for the thoughtful and candid reply. It has increased my faith in the moderation some, not because you have convinced me or I agree with you, but because it shows you are thinking in nuanced ways about this and engaging with the actual issues (and not just adhering without question to some written mandate).
I actually also agree fully with your analysis of the fundamentals here, just not your wider perspective.
Yes, I fully agree there is a risk of changing HN to the worse for no reason. But doing the right thing in uncertain times always carries a risk. As seen in this very story we are discussing: Alex Pretti risked his life filming the violent ICE agents, for very uncertain gain, and ultimately paid the price. I still think he did the right thing. Compared to the price Alex paid, "a worse HN" seems like a risk worth taking.
And no, I don't think allowing more controversial topics on HN will make a major difference in the context of world politics (or prevent the apocalypse). But when it comes to things like these everyone will always feel too "small" to matter, and the end result if we listen to that feeling will be that no one does anything instead of everyone doing something to improve the situation.
I'm not spending my time arguing here because I think it will change the course of history, that my posts will actually change the moderation policies of HN, or because I think that by doing so I would save the world. I'm doing it because it's a minor line in the sand I could draw in a community I am active in, and it's better to try to do what we can (however minor) than just giving up. No one can do everything, but everyone can do something, etc etc.
I don't think we will reach any agreement regarding the wider perspective today, but I do feel like I have gotten the nuanced answer I requested regarding the moderation policy of HN in the context of the current mayhem going on (beyond just avoiding flamewars). So, again, thank you for that.