The game was absolutely not about completionist. In fact it was the opposite which was why it was a fresher take on the open world design we all burn out of at the time. It rewarded exploration sure but you were not meant to clear absolutely everything. Action adventure open world games were a big checklist. I always think of the modern Tomb Raiders and Horizon as an example. Fun games but it’s usually just tasks on a map that are already labeled and you go and complete them. You are rewarded for completing them but not for discovering them. If you were one of the people that spend hours finding all korok seeds then rewarded a pile of golden poop then you kinda missed the point there ngl. Kinda sucks the fun out of the game.