Fate monsters die instantly, you don't learn anything about hate management. Party fates don't have anything relevant to contribute to knowing how to operate in a party environment, where you have healer, dd, and tank. Take a fate party, which is typically all dd's, and put them in a dungeon, and they couldn't clear it because they don't have the relevant classes.
You take away fate, and people will party because it's how you xp. People will also learn how to play in a party, and you won't see all these "how do you get to xx level without knowing how to play" threads.
