so form what im seeing, its mostly for lore reasons why we shouldn't have firearms? i just think thats a little constructing to limit game potential do to the lore. think about it, humans went through the dark aegs too which evolved into the age of sale which brought about the use of the cannon so i cant see how TES isn't gonna evolve into that to in the future.
One cannot compare how the world of Real Life work compare to how a fantasy land in the Elder Scroll. For example, Real Life don't have magic, or that our stars are hole in the sky that give out magic, or that it does not have god interaction like that of from the Elder Scroll.
Lore act as a way to make sure the game does not just add in random things without explanation or junk without reason.
Then its the whole ordeal that one suggest to add in firearm in a Sword and Magic RPG game. Its like suggesting DOOM should start using magic or giving Diablo a makeover graphic that is colorful as like that of My Little Pony.