Picture someone who drops the show after a few islands because it looks like the same loop: new island, tyrant, punch. Fair. But then they miss Water 7 turning into a betrayal mystery, or Marineford where the crew isn't even together. The formula is a frame, not the whole painting, and the long payoffs are why it's lasted. My opponent's fanservice point is legit and worth criticizing, but that's a content flaw, not proof the whole thing is generic. Plenty of shows copy this and don't land.