As you can probably guess, I strongly disagree with this decision. TempleOS articles have been appearing regularly on HN because the dude behind it has realized it's a safe haven for his nonsense. There is nothing to be learned from it, it's the ravings of someone with mental illness. Indulging him and giving him this "safe haven" where he gets the impression that professional programmers are treating his garbage seriously is doing no one any favors. Nor is the minority of developers on HN who actually do take it seriously doing anyone any favors.
It certainly isn't helping the quality of content on HN, if that's all you care about.