The security implications of allowing communications on a platform that is subject to the absolute control of a foreign government, seems like a very very bad idea. That can be a lesson learned the easy way or the hard way.
Well, I'm more concerned about my platform being subject to the control of my own government. Because I don't care very much about foreign governments given I happen to be a western citizen that has nothing to do with that countries. But what about ours, do you think our government is better than theirs? For how long?
America has problems, but your order-of-magnitude calibration is way off if you think a concentration-camp operating (i.e. the real kind with over a million people who committed no crime and are held just for their beliefs and culture) expansionist (Hong Kong, Tibet, Taiwan) totalitarian (speech is monitored and punished in a "go to prison, right away" manner rather than "twitter deleted my racist shit and nothing else happened to me" way) government. So yes, occasionally ineffective democracies that value human rights and freedoms (i.e. the west) is better than the CCP government, and will continue to be better now and into the foreseeable future.