Why convince them? If they never go outside, they’ll just be inside anyway. You won’t interact with them. Metaphorically. Real life is a place, not an idea.
Real life is a place encompassing the "cyberspace", too. They're not separate but intertwined. You argue that people affecting your life are the closest ones to you, but continuously interact with the ones who are farthest from you distance-wise and they affect your day at the moment.
Maybe this is worth thinking about.
As a bit of a semi-related aside, while everyone has different motivations when voting, as a whole when folks are able to vote for their gov't, one hopes that enough people are thinking about what is good for the majority and society as a whole and not only what is good for themselves. And that has more impact at local and state levels usually. A bit idealistic, admittedly.