Same can be said for grinding, though PPQ actually requires more effort since you're not just killing the same mobs over and over again, you actually have to pay attention to what you're doing. You're clearing maps, farming etcs from waves of mobs & handing them in to a npc, farming keys then trying to close all doors without getting hit after your party has 4 keys, killing the pirate boss... That's far less braindead than most of the meta grinding spots like 94th floor, windraiders, himes, etc where you don't have to pay much attention to the gameplay and can simply have party members stationed in different corners of the map for steady exp.
It's not just flat maps where you have to kill mobs. Some maps have mobs spawning on three separate platforms, there isn't a single map where mobs spawn on a single platform. It takes teamwork and attention to clear these maps efficiently, if you leave out a single mob in the mob clearing maps, you can't progress to the next stage.