No, I don't see myself as being very knowledge in Chinese politics.it appears that you believe you are quite knowledgeable in "Chinese politics" for some reason. What is needed to understand this stuff is not just reading some news articles and wikipedia pages, it is actual life experience. ever held a supervisory role in a large, centralized organization? the will of the leader matters a lot when he is in power. certainly others within the organization will have to buy in in order for it to work, but generally you need a strong leader who is invested in the cause for the rest to really work towards it. I have seen this work out in real life.
by your argument, no one's policies should get overturned because it is the consensus of the party, but this is simply not true. we have seen stalin overturning lenin with socialism in one country, kruschev overturned stalin with the secret report, then overturned again by brezhnev, then again by gorbachev. the CPC has also oscillated on its policies from one leader to another. you can argue all day that CPC leader's policies would not be overturned, but the fact is the last two prominent CPC leaders were all very much concerned with sustaining their legacies. Mao got rid of Liu because he saw what kruschev did to stalin, Deng almost got rid of Jiang for wavering on reform, and sidelined Li Peng in favour of Zhu. facts seem to not align with what you said there.
But just what I'm able to glean, already tells me that you very much don't (being able to judge, say if a game is good/fun is much easier than making a good/fun game afterall).