Having tried all three, its a stark difference in how much more social Lemmy is comparatively. Its not even close. Almost all posts I've encountered on lemmy have interaction; whereas, more often than not, posts on the other two platforms have no interaction. Wonder what the driving factor is behind this difference?
Liberalism is the dominant system, though, and revolution is still the only way we will be able to get meaningful change. Liberal identifying people can be disillusioned with the system they perpetuate, but have yet to meaningfully change the system. Leftists globally have a much better track record at getting change.
A big part of it is Americans at large object to any kind of coercive governance however it manifests. I can't in good faith say that nations like China or N Korea that exercise such tight control over the public media and messaging are a net good to their population. Cooperative social goals for universal housing, healthcare, a decent standard of living are good, but we have a huge portion of 'bootstraps' minded folks that get in the way. In the meantime we get this piecemeal patchwork that we have that over time has lent itself to rights for minorities of various stripes that eventually get adopted as the norm. Right now we're sitting at a spot where the pendulum of progress is being pushed hard back right, how to stop that is the tough question.
Over 90% of Chinese citizens approve of their government, regardless of what you believe about their system they seem to enjoy it. You should listen to others outside the west more.