I don’t think that’s correct, depending upon your definition of "social networks". People were complaining about people not RTFAing on Slashdot in the 90s.
If one squints enough, Plato's Cave could be a complaint (circa -375) about opinions via pale shadows of secondary and tertiary sources.
https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext...
https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext...
Next 30 reads the title, read comments, and write some pretend skepticism.
Next 300 reads the title, view comments, upvote the strongest opinions, and share.
Next 3000 reads the title and immediately decide whether to share.
Somewhere from here and above, 3-4 people tries to plagiarize something in it just to get votes and/or because they have personal issues in forming opinions.
Rest of the million people after this point just applaud and share what’s being thrown at their faces.
All major News organisations know that only small fraction of their audience on social networks even click the link anymore and rest of them just make up what they wanted from the title and description. At least now I think, Facebook doesn't allow one to alter the title, description of the website they're sharing; for years someone who shares could change those as well!