Honestly I think a goal of dominating/owning a world is more appealing than either destroying or saving.
this is the natural evolution of all in-depth game simulations, to eventually conquer the game world as the ultimate goal. very few games have ever been built with that level of scope though. i did one once. RPG. start out as 1st level newbie. get all the way up to high level, start building a castle and raising an army. Conquer all the other fiefdoms on the map and then there's nothing left but random dungeon adventures to pay troop and castle upkeep.