I totally second this, and have a recent concrete example where at the beginning of this year Sweden's (probably) most serious newspaper (what I'd consider a 'journal of record' whose articles should be a point of historical reference), published a long-form retrospective article comparing Sweden's handling of Covid with the way other countries had handled the epidemic, and included several internet 'myths' that had bandied-around on social media, citing them as facts, and even including one 'interview' with what purported to be an eyewitness of one event, which turned-out to be taken from a Facebook post.

I wrote and complained to the responsible editor with citations showing how and where the article was wrong, and a few very grudging emendations were made (effectively saying that even though the reports were still probably true, they couldn't be 'verified').

Totally horrified me that, in wanting something to fit their facts, journalists simply accepted fiction they read on Facebook and regurgitated it in their articles.

I used to hold them in greater regard than that.

That's interesting, because it possibly led to a sort of well-meaning destruction. Was the content surgically edited, or did it grow a warning that some of the info originally published was incorrect, or (more perniciously) both? Consider the affect this has on researchers trying to do studies on misinformation—they certainly want to be able to access the originals themselves.

I guess it has something to do with lack of trust in Established Sources of Information—TV, newspapers, experts and other various figures of authority. The biases of the Established Sources has become more apparent over the years, to the point where scepticism, doubt, and even defensive cynicism are fairly common default attitudes when dealing with the information they provide.

The trust in anonymous strangers is, at least in part, the result of them not being Established Sources. It's not a lying politician, or a deceitful news anchor or journalist, it's just another well-meaning regular person like you. That alone makes you more receptive to their message. If their message happens to align with your existing beliefs, even better. Of course, it can get into cultish/conspiracy territory if any of those beliefs are directly opposed to the mainstream narrative.