the players may have gone through the end game but a) the world was new and they wanted to go through the bosses and hang the trophies together, b) the world was new and the base wasn't ready for the raids that advanced or c) it was supposed to be a creative world where they can build and explore without worrying about raids that are triggered by hanging the trophies or d) any number of other reasons people shouldn't be a ♥♥♥♥ on a cooperative game