There is no duty in-game that forces people to use AoE in order to clear it.

MSQ and/or Job quests should have a duty where you need to kill a group of mobs ASAP. These mobs have very low HP & attack, you can kill them easily by using your AoE combo 2 or 3 times. If you don't kill the mobs in 20s or less, they enrage and the duty fails.

The development team needs to start introducing duties that help the player base improve their gameplay.