I think the charitable interpretation is that there are people who want HN To contain only things with a compelling connection to technologies, science, or other kinds of curiosity that involve the natural world. If they consider it "off-topic", then the guidelines do state that a story being "off-topic" is an occasion for flagging.

Note: This does not preclude the existence of another group of people, who are misusing flagging because they dislike the conclusion or viewpoint of the story.

That said, moderation is hard, and if posts like "Twitter moves headquarters" are OK because it's related to the software/IT, then we ought to also be able to talk about IT security policy getting screwed up in other large organizations, including the US government.