If they just showed the title and the link - like they used to - they it would drive revenue. But because they show a synopsis of the news, people very often don't click the link.
I'm skeptical that such explicit summaries are the only thing social networks display. Even if that is currently the case, it would be relatively trivial for a company the size of Meta to generate and show their own summary.
It might be technically simple but it’s probably legally complicated to write a summarizer that doesn’t violate copyright. Using data they are explicitly given permission to use by the definition of the field it’s in is quite different though.
