I'll remind you that a fictional product that provided longevity and woo woo powers of prescience and was only available on one planet in the entire universe was the key context that enabled such a centralized society. Dropping thinking machines and their masters like a bad habit was only part of the cause, as it eliminated one means of safe interstellar travel in that reality. I can take ideas from this plot without bringing in the whole ridiculous mess if I like, just like I can walk and chew bubble gum at the same time, thank you very much.