Magic is no reason why guns shouldn't be in the series. The reason they shouldn't be in the series is because we (generally) don't want them.
Yeah! Why invent boats when they have water walking spells? Why have stairs when there are levitate spells? Why have beds when there are restore stamina spells? Read what PeteAtoms said.
Yes, haha, he posted his annihilation of my argument while I was writing it
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I suppose I was just trying to defend something that I really don't want in the game, without applying the argument to all aspects of the game. My bad.
IMO, guns have been done to death, and there really aren't that many good purely medieval fantasy games out there. I guess I can't really explain it, but I am extremely opposed to any sort of gun being in TES.