It's extremely rare for journalists in traditional media to publish email headers, even when people are accusing messages of being inauthentic and the DKIM would go a long way towards certifying them and when people are begging for them. I think I'm aware of only one other instance, though I've personally begged journalists for headers multiple times even in some cases where I was a subject of the article and not some random nobody.

From the perspective of protecting sources it's probably good advice to avoid publishing any kind of opaque header-stuff. But also, most readers wouldn't know what to do with the information and -- less charitably-- publishing evidence moves away from the framework where readers accept the reporters word on blind faith.

Your position was entirely understandable: I declined to link to the repo or the two flagged HN threads about it, though I considered it, because I thought it would increase the risk that my comment would get flagged. I think your reply had the surprising consequence of making a really good example at how effective the suppression of info like this is at distorting the public discourse.