still can't believe Mewt made the whole thing up

so if Mewt made up Ivalice does that mean that Ramza's whole story... is a footnote in history for a world that only existed as background for a bunch of kids who can barely play snowballs??? those kids made up Cúchulainn the Tainted King because nobody splained about death properly to Mewt who is like 9???? I can't BELIEVE this I don't have a single Tactic for this