1.0’s story was a bit different because nobody remembered that you were the original WOL (except Minfillia and Cid in the legacy cutscenes) everyone remembers you after prae but by that point even ARR WOL’s are famous so them suddenly dropping the original WOL plot works fine

The H+Z story has shifted the entire 7 remaining worlds in a massive way, if they altered dialogue based on if you skipped or not they would be writing functionally two seperate games