I think this raises one key question (maybe the key question) about the relationship between worldbuilding and RPGing.Isn't the DM in charge of the lore? Why would the players try and police the DM's lore?
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If I say that my campaign has dragons that don't keep slaves, and that don't talk, no one is going to complain about it. It's my setting, I can do what I want.
Shared fiction is at the heart of RPGing: the GM describes some situation to the players; the players declare actions for their PCs; those actions are resolved; new fiction is thereby established.
What is the relationship between this collective endeavour, and one participant's sole authorship of a whole lot of stories?