This is the same argument as used to defend any totalitarian government. Basically "if we give total power to X, they will use it to hold back Y", and it always has an implicit assumption that X is good and will never turn evil.
He presents "policy changes without party changes" as if it's a good thing, but your country being able to switch between Mao Zedong and Deng Xiaoping is not the flex you think it is, considering it just takes the next ruler being a little psychopathic to switch right back with some lame excuse. We saw the shit they did during covid. We see what they do in Xinjiang and Tibet. At least America and Europe is relatively predictable. You can see the cultural trends from years in advance. Unless your trying to build a business in a legal grey area, you are gonna be fine if your not completely delusional. Just look how Jack Ma got disappeared with no warning. In China your fine until you're not.
