adding guns would imbalance the game. There is literally no reason why you should need any sort of advanced weaponry to kill a creeper. Guns would imbalance the already stuffty combat system.
Okay so apparently Mojang can't balance
that's nice of you to say
So because Jukeboxes are in the game, firearms should be in the game as well? That is a very silly connection to make. A block that plays music does not disrupt the game feel.
You said, and I quote,
"
The game is focused around simple machines like simple stone furnaces and pistons with a bit of magic thrown in in the form of other dimensions and enchanting and such. It takes on a sort of Lord of the Rings vibe, and guns would completely break that sort of "medieval fantasy" immersion."
A jukebox is not a simple machine and does not fit in a "medieval fantasy"
And actually, correcting myself, firearms can be traced back to the 10th century,
so, right smack dab in the center of the Middle AgesAnd for your viewing pleasure, a recreation of a
14th century handgonne, ie early firearm

Advanced my ass, that is quite literally an iron tube attached to a piece of wood and a lit fuse
You have access to
funnel, which is essentially a wide-nozzled tube,
planks of wood,
fused gunpowder based explosives, and the ability to
smelt metal into rough shapesEarly firearms are in no way too advanced for Minecraft