When you meet people you want to connect with, what happens next? You might exchange business cards, a text, or email addresses. Will you keep track of that information, or not? You don't have to, but it's not enough to just say "Let's do lunch."
Share based on your connection to someone. Facebook is a connection AND fake news. Twitter is a connection AND a 140 characters maximum. Be in control.
You have more than one picture! Change it! Got a new job, or signed up for a new social network? Updated automatically. Everyone gets just what they should have.