I think mostly the point is that it inadvertently implies that the message adds something new. A note that the same thing was posted on LinkedIn would help the ones tho did read the linked content know right away it's the same. I managed to just move on, but I did had a knee-jerk moment of "what if I'm missing something?" - I suppose for some people it's more difficult.

Why would somebody click a link to GitHub and then not read the text that very obviously pertains to the title of the submission they clicked on?

Also saying that GitHub has unknown UX patterns made me lol.

>fraught

dumb "journalists" especially have this backwards mindset.