All they have to do is make fates give a decent amount of exp, rather than a tiny sliver to your exp bar.
People actually do ARR fates cause its still a decent form of exp while waiting for dungeon queues.
I get that they want the duty finder to be the main way of leveling outside of MSQ quests, but doing that by making fates just a waste of time isn't a good solution and just begs the question why they bother with fates at all.