Facebook explained that the new, non-human Trending module is personalized "based on a number of factors, including Pages you’ve liked, your location

Facebook explained that the new, non-human Trending module is personalized "based on a number of factors, including Pages you’ve liked, your location (e.g., home state sports news), the previous trending topics with which you’ve interacted, and what is trending across Facebook overall." I don't understand how putting their users in an algorithmic echo chamber is a good idea (not to suggest manually curated the trending news was good either). There is already enough distortion of the world caused by whatever flavors of nonsense are popular among a user's set of friends. Why add more?