Because FB collects so much data about everyone and it would be nice to have personalized news, events, articles in your feed. Instead of using websites that show the same thing for everyone.
But they use all that data to show me pictures of crappy food, kids, drunk parties and stupid FB game ads.
FB doesn't optimize for enriching you, or even for agreeing with you - it's optimized for engaging you. If a barely-lucid rant comming out of a political faction you hate will mindworm you, that's what they'll show you.
>Instead of using websites that show the same thing for everyone.
But that's a good thing. It sounds like you WANT to be ensconced in a political bubble. People splitting off into echo chambers is a major source of the problems we see today.
But they use all that data to show me pictures of crappy food, kids, drunk parties and stupid FB game ads.