HN changes (and suggests submitters edit) submission titles generally
if that edit will provoke a better discussion.
Sometimes that's removing or changing clickbait phrases. Sometimes it's clarifying or sharpening focus. Sometimes it's softening, blurring, or removing provocative language. And in every case I'm aware, they've commented on having made such edits.
It's a judgement call. I've edited numerous of my own submissions, often for length, occasionally in mind of discussion. I've emailed the mods, usually for clickbait (in the original) titles. Sometimes my edits are accepted, sometimes not.
But what's been done here isn't an exceptional practice. And given the already politicised nature of the topic at hand, for HN, I fully stand by dang's edit in this case.
(Would have commented earlier if I'd had a decent keyboard available.)