Yes. You have made a false/weak assumption. Humans do not always favor centralization, if we did then you would expect our society to be eusocial like bees or a

Yes. You have made a false/weak assumption. Humans do not always favor centralization, if we did then you would expect our society to be eusocial like bees or ants or something. Humans aren't machines, we adjust our level of cooperation and competition to suit our environment, and the technology in our environment can either favor centralization or decentralization of social structures.