FATEs just have no impact. IF we take GW2 which actually implemented them well, failing succeeding a dynamic event actually has an effect on the map/surrounding. Maybe a town will be taken over/liberated, maybe a path will be swarming with enemies instead of being guarded by allies. Hell a chain of those even affects the entrance to a dungeon! FATEs in this game have no consequence and give barely any reward of worthwhile importance, so why care?