I think it specifically works for links. Doesn’t work for text posts, at least as far as I can tell.
Super annoying but a great time to bring up Lemmy’s crossposting feature! If the image is hosted nonlocally and posted separately, Lemmy can automatically combine the posts and show it as crosspost links. Seems like this feature should work for local media as well but does not seem to in this case. Now this could be user error or this may be a place that the feature can be improved.
Honestly this is why I could never get into him. I feel like he also tends towards a lot of anti consumer takes for a product reviewer.
To be clear, the article is talking about correlations in polling, not suggesting you strike up conversations with your neighbors.