That said, it's not like people fact-check CNN, MSNBC, NYT, WaPo, Fox News etc (though Fox News probably gets fact-checked more than the rest). There have been many times just this year that all of the above have gotten stories wrong, or published disinformation because it fit a narrative.
This doesn't even get into the number of blog-style news orgs out there. And it's coming from all sides, and really hard sometimes to tell what is, and isn't actually truthful. I'm not sure I can expect FB/Twitter to be able to handle it on an even larger scale.
Everyone is in their bubbles and it's pretty toxic in a lot of ways. And I'm not sure I could even begin to suggest a way out...
I've been trying to convince people to take the week of Christmas off social media (5-9 days, depending on weekends) ... and no traction at all. I don't have a large follower base.