I don't know what Facebook you've been using, but millions of people appear to love nothing better than responding to low-grade content mills that push their emotional buttons.

The idea that "You won't believe what <popular/unpopular> celebrity said!" or "Trump outrage #942134!" gets tons of engagement when written by a human, but will make people leave if it's generated by an algorithm is hard for me to square with the social media landscape that actually exists.