"If I follow Sue on social media, now I know her politics, religion, sex life, drug usage, opinions on every little thing.. and frankly, I don't care or want to. I'm happy just playing some Catan once in a while."

I have a slightly different view of this. People's opinions on things are always in flux, even if they sway heavily toward one side. What we see on social media is a person's opinions without the context of a human interaction. On social media, we see Sue's emotional response to politics without her having to negotiate that emotional response in relationship to another person sitting in front of her. She may "believe" what she says in the moment she types it, but put her in a room with a friend who disagrees and you can watch how her views shift, push back, concede, change, challenge, etc. On social media, there's very little of this taking place, because there's zero human intimacy at work. It belief in a vacuum not in relationship.