So I have a question. I can understand you being annoyed at the magical elves argument, and how annoying it may be if it seems like people are telling you that you don’t know what you want.
But I don’t really know what the above quote means. I would see a world independent of the PCs as not being anything. The players, via their characters, are what make the setting work.
So I think the confusion here is mostly terminology. And I want to actually understand your game and what you’re going for. But a “pc-independent setting” seems like a contradiction to me.
Do you mean you want a setting with consistent mechanics that work the same for PCs and NPCs? I feel like that’s part of it, but not all. What more is there to it?