The Big [Censored] Theory

I don't really agree with this, but consider this argument : Is it really a bad thing if different countries have different understanding of what's allowed/not allowed? If the whole world had the same system of governance, that could be dangerous too.

Because the people of China didn't choose this: their oppressive and authoritarian government did it for them.

This is right. If people vote for censorship in a democracy, that's a perfectly fine form of governmental heterogeneity. What's happening in China is not that.