Why do people keep saying this? Ranged, caster, pet/summon, shapeshifting, 1-handed, 2-handed, duel-wield, bare-handed, guns, whatever. Pretty much any concept you can apply to DPS can and has been used for tanks and healers in other games. RIFT, ESO, WoW, Archeage, Wildstar, DCUO, CoX, etc... I'm sure there are others but you get the idea. FFXIV is nowhere close to being all out of concepts for non-DPS jobs. The idea that they are is laughable.