I am 6'4" tall with a very short arm length, meaning I need not only extra length clubs but a much steeper lie angle than "standard" clubs. Mine are bent some 6* upright and my divots are correct, my impact is solid center, and my previous experience with flatter lie clubs was "I CAN'T PLAY THIS STUPID GAME AT ALL!"
Sometimes the Arrow is simply wrong.
ALmost all my pupils show up with lie angles either too flat or ok: I don't recall ever having one needing his clubs flattened!
My clubmaker tells me OEM clubs seem to be made with steeper lie angles AND that a good deal of his practice IS bending them more upright. He doesn't have an agenda other than good fitting, so this is not a personal bias of his.
Of course with a toe-too-far-down impact the toe DOES catch the turf and can deflect the face: whether it actually DOES doesn't matter since the LOOK of a toe-down setup or divot is uhg-LEE.
In all of this I don't want to neglect the sheer comfort of addressing the ball with my hands hanging close to my legs--relaxed and natural feeling. So I do not any more contort my natural ease (by reaching out and bending over, obviously) by "trying to use a club that is too flat."