Online spaces are limitless, basically. If you don't like living under someone else's rules it's dead easy to spin up your own space with your own rules. The dictatorship-ness of these virtual spaces keeps then semi-civil and on-topic. Ideally, at least. We are talking spherical cows here, obvs.

Real life spaces, not so easy to spin up your own country. So we have to use a political system that (on paper, at least) caters to the majority without stepping on the minorities too much.