Why, logically, should he respond to this? Your only response is gonna be "... But its not hard."
I've got a nearly perfect, 1st try clear record (beyond the Nadaam and Thancred) with these story instances. I know how to play my WAR. And optional Moogle difficulty for them is fine with me cus it doesn't effect me, unless I choose it.
For those going on about how this will effect skill level in the DF, you can't be serious. You are making it sound like these are a gateway to dungeons or something. You remember group content is a requirement starting at level 15, right? LONG before we hit things like The Grand Melee. Stop being silly. These story instances aren't training, whether the player wants them to be or not. They're one-shots, only replayable with NG+. Let the moogles have their difficulty.