I think it's better for 10 different companies to each have 1/10th of your data rather than one company having all of it. Facebook has grown to the point where

I think it's better for 10 different companies to each have 1/10th of your data rather than one company having all of it. Facebook has grown to the point where they're just too big. They have pretty much every person I've ever known as a user. Those users have the app (or multiple apps) installed on their phones, upload all their photos, do much of their messaging, plan their events, etc. within Facebook. Plus Facebook owns a bunch of other properties with huge user bases. The potential for abuse is smaller if we use independent services for all of those different things, even if those services aren't any more trustworthy than Facebook.