Jack Daniel
Legend
And I suppose you are right, that we can't really force someone to change their values, but this is one of the few times that I feel the resonse "then just write a novel" is appropriate. If you really can't allow anyone to change your world, if it must be your singular vision, then a cooperative DnD world where the players can affect the entire setting and permanently change it, is not for you.
DnD is a cooperative Team Game. "The DM is a player too" means that they are part of that team. If they don't want to play a team game and cooperate with others, then why are they playing DnD?
And maybe I'm taking it a step further than you envision. Maybe they are only against their "canvass" being touched by "the art critic" when they are in session 0, and after that the players are free to do whatever they want... but I get the feeling that someone who sees the work of world-building in the manner that they are a painter working on a canvass is going to have that "whatever they want" followed by "within the limits I allow"
What did I say before about being deliberately obtuse? You know full well that world-building is one thing and the player characters affecting the game-world through in-game action is quite another. Conflating the two is at best a failure of logic and rhetoric, and at worst intellectually dishonest.
I award you no points, and may God have mercy on your soul.