Well, think what you will. But, there's a reason why a normal bolt of lightning can strike Superman and he won't feel a thing, but should Thor decide to smite Supes with a bolt, he'll go down like a sack of potatoes.

There's a huge difference between natural elements, and artificial mana-produced elements. Hence the reason why in the Final Fantasy games, there is a specific spell (Shell) for defending against magical attacks. If it was just regular lightning, it would be classified as a physical attack, because it's not reacting with the mana energies present in all things. That's also how spells are focused and aimed at a specific target; by homing in on the mana flowing through everything. If a wizard just called down a bolt of regular ligtning, it would strike the highest object or the nearest conductor, and it would most likely miss the desired target. Mana is also why Bolt spells work indoors. You can't summon a bolt of lightning when there's a couple of floors worth of castle above your head.