What's tricky? The easy way is to conduct a thought experiment - given a choice, would you live in a violent democracy like the USA or a "peaceful" dictatorship like China? And guess what, you do have a choice (modulo some paperwork) to live where you want. Let's see you go live in the rising superpower :-).
More seriously, the argument is not that there aren't good points about every society/ country/political system. Of course there are, if you look hard enough.
A system's goodness should be judged by the people who live under it and the Chinese don't have the luxury of choosing what system they live under. Till they do, and voluntarily choose "harmony" over the right of free speech (say), any "goodness" of the dictatorship is purely hypothetical.
Anyhow, I didn't (and don't, any further,) intend to argue politics on this thread. It is just that I am a bit sensitive to people advocating that others suffer "for the greater good", while avoiding any sacrifice themselves.