> Facebook is what you make of it. It offers relatively granular control over who you want to see so if even you must be friends with someone, you can still unfollow them.

Recent events have demonstrated that the privacy controls are not what people think they are. Cambridge Analytica was able to access data belonging to the friends of people who granted certain permissions, and there was a recent data breach caused by a bug in an impersonation feature. Advertisers are able to see quite a lot of information too.