I think you are underestimating the number of players that would not be interested in that. Not because they have been "Trained" to be passive receptacles, but because entertainment in all aspects of life is mostly passive.Why is THAT sort of thing not being included in advice? That's how we get around the "forever players" who just passively wait for the plot wagon to show up.
That said, I agree that a game in which the players -- and their PCs -- are heavily invested in how the world looks and operates can make for a wonderful gaming experience. I ran a 2E campaign that ended up stretching through 3E and into a super heroic future run via Mutants and Masterminds over the course of 20 real world years. The only reason it lasted that long, I believe, is that the players made that world as much or more than I did. But that is a rare case, in my experience.