A common recurrence I see here when people say how their life improved after quitting fb, is that people seem to have been addicted to it.
I like fb. Messenger is useful because almost everyone I know uses it. Seeing events of venues and making them directly, getting updates from the host is very convenient. I like getting into political discussions.
But I've never felt the need to look at the horrible FB wall all the time. I never felt compelled to go to FB all the time.
I also went through the settings and set my privacy settings as I wanted them, long before any of the FB scares happened.
I think Facebook is a tool and if you become addicted, then yes, you should probably quit. But otherwise, use it in a way that helps you.