It's not a "problem" for you or I per se. It may be when the balance team sits down and maths stuff out and the potential for ninja in dungeons is this dps or that versus what they consider where aoe dps ought to be for say smn or blm. For all we know that doesn't matter to them cuz they instead put in a hard cap of 8 mobs or whatever that a spell can hit and that is just one of their arbitrary rules to limit dps overall.