Who needs firearms and explosives, when you can conjure daedra and hurl fire?
Of course. But here's the thing... what about bows and arrows?!?! Why should they exist? If fireballs override the need for firearms, why should bows not be included?
Why should mundane armor/weapons exist when we got bound items? Heck, you even have the shield spell. Are these blacksmiths wasting their lives by studying metallurgy, and are the people being completely idiotic when they pay for these things?
Lock picks and torches also become pointless.
Lots of transport problems are solved by Mark-Recall and similar spells, et cetera.
Roads, boats, wheels/carriages, domesticated horses/steeds, stairs, bridges... All of these are redundant transport techs/knowledge, given the uber magic alternative that makes their existence illogical.
Anyways. I wonder what the lore behind technology is. Were the first mortals created with all of this knowledge in them? If magic is a recent phenomenon in Nirn, it makes sense that these tech's exist from an age when there were no magical alternatives. But if magic has been around since the beginning, what the heck are all these things doing in my TES? lol
Look, here's the way this works. Bethesda seems to take a lot of pride in how intricate and believable a world they have created. Because that world is not real, it is not realistic despite being remarkably consistent internally. Therefore, the equasion goes like this:
The principle that necessity is the mother of invention stays true.
In our world, there is no readily available limitless supply of practical magic that can be harnessed for any number of purposes at will.
Therefore, in our world when we have need of doing something more efficiently, some slightly unhinged person creates a device that does so. See: wheels, computers, telephones.
In TES, since it does have a readily available limitless supply of magic energy, if someone needs something done they invest in spell research. While mundane inventions do get made, since far more money and attention is given to magic research any mechanical technology would likely be developed slower.
Pretty much. So while I strongly insist firearms are not inconsistent with the setting, it would be detrimental to the flavor of the world.