[SPOILERS] Revelations from Patch 3.3

[Theodric]

Well, if Eorzeans were the ones who couldn't use magic I'm pretty sure they would be experimenting with ways to get around that too. Not to mention a lot of the potential power(s) that the Warrior of Light and certain other Eorzeans wield is pretty dubious too - such as what WAR, SMN, BLK, WHM and DRK wield. Though in each case they're currently fairly rare.

Personally I'm hoping that Garlemald makes some pretty major advances and it becomes a necessity for the Warrior of Light to rely upon that technology at some point in the story to deal with a greater threat. It doesn't even have to happen directly - just indirectly, much like how Shinra in FF7 were responsible for taking out a Weapon and opening up the path to Sephiroth at the end of the game. Without that it's very likely that FF7 would have ended very differently and with Sephiroth/Jenova winning.