I don't believe it's impossible for you to be correct and for the Chinese government to still be seriously concerned about revolution risk. Whatever the reasons are, it is what it is. FWIW, I do agree with all your points too. A tour through their national history museum in Xian shows how proud they are that Mao was able to finally set China on its own feet on the global stage such that it no longer would be forced to be a vassal state in the future. It opened my mind about why and how the Chinese government creates and implements its foreign policy. It never again wants to be a vassal state, and everything is seen through that lens.
But just as they are worried about the threats from without, they are also worried about the threats from within. This is what I see in their domestic policies.
But just as they are worried about the threats from without, they are also worried about the threats from within. This is what I see in their domestic policies.