Agent can use gadgets to heal people... and guns to shoot things... Just saying if we have flying airships unlimited magic all over the world. to think someone cant use some sort of gadget as a healing device. It depends... For all we know we're getting Musketeer as a class and it'll seperate much like Arcanist does for Summoner and Scholar.

Just because DRK starts off as a job doesn't mean the gun class will.