I would think its reasonable and lore friendly to have primitive civil-war style flintlock weapons. its is entirely reasonable for them to exist. And this is a video game, we dont "need" anything we only want and I want some lore-friendly guns to give more diversity to ranged combat.
But there can't be lore friendly guns. You are thinking of Call of Duty, not TES.
Remember lore is what is past.
And that's what people love about swords and bows. It's what is past. What happened in the real world when guns appeared? Bows became completely obsolete., Swords were reduced to the boarding cutlass or the cavalry sabre: Backup melee weapons after you fired your pistols and musket.
I want a game without guns. Is that so hard to understand? I love shooter style games. I even collect guns in real life. Can't we have a fantasy world with fantasy weapons? Bows, swords, spells, monsters... there's plenty of games that already have guns... are all games supposed to be the same? Why not grenades, or rocket launchers (hey, they could make a lore friendly Dwemer rocket launcher!)... why not jets and satellites and nukes?