I don't think most people actually get to know like minded individuals on social media. They just flock together on specific topics and don't associate where they disagree. When you meet people in the real world, chances are you are unlike in some ways by default. People just don't express their differences in superficial context. You don't find the differences unless you ask and listen. At least that's been my experience meeting people.

Doesn't social media replace meat-space friendships?

Is there a species of 'Tinder'... for finding friends?