Luffy's final showdown with Sir Crocodile still throws One Piece fans for a loop, but there's a simple answer.
Luffy's actions in liberating kingdoms and fighting in wars make him a hero in One Piece. Being a hero in the series is subjective, with differing perspectives on characters' heroic qualities.
Luffy's attacks in One Piece show his evolution from undisciplined creativity to disciplined technique. Gear 2 and 3 exhibit Luffy's passion and strength, while Gear 4 combines this with ...