I'd say "No", but I picked "Comment" to explain why.
Firearms are, by my estimate, the second deadliest weapon in history (the most lethal being incendiary weapons such as flamethrowers, naptha, tar, Greek Fire, napalm, etc).
That said, once they arrived, they only pushed the cycle of research further. Gunpowders were one of the first forays into true Chemistry, which led to such wonders as plastics, rubbers, and baking soda volcanoes. Gunsmithing led to improvements in high-temperture, high-pressure metals, such that we can build rockets that don't explode instantly.
Guns as weapons were not very effective at first, and only really began to outpace the bow-and-arrow in the 17th century AD/CE. Once they began to take the lead, new weapons were created to negate the advantage of having more or better guns. Tanks and new types of naval vessels were created. Guns advanced. Guns began to be mounted on aircraft, and anti-air guns were created. Massive artillery guns capable of creating protracted trench warfare were employed. War became a deadlock. A new invention, the Airplane, began to be used to try to break this deadlock. Bombs had to keep up, and planes had to be better and better to get past the anti-air guns. Soon the need for a bomb that was powerful enough to offset the risk of flying through flak became apparent, and the Germans began researching nuclear weapons.
The US got in on nuclear research, and even the technology from guns was present in the first atomic weapons: one of the methods of triggering certain styles of nuclear weapon is where one piece of uranium is fired into another, gun-style.
And since Nuclear Weapons, through the Cold War, created the modern world, it's safe to say Guns = important, in a roundabout way.
Guns are the great equalizer. Without them, strong people would still be able to kill each other, but weak people wouldn't be able to defend themselves from the strong. So no, I think guns are for the best.
You can never say. Maybe someone else would've invented something even deadlier. Maybe World War II would've been fought using crossbows and swords. Maybe we'd be living in a utopia, somehow coming to realize war and fighting were all meaningless.
iduno, we cant really be sure if the world would be better with or without guns and fire arms. the world could be better and/or worse without them. allso just becaus guns wont exist doesnt it mean that war will disapear as well since my bet is that people would make strong hightech blades and bows n arrows instead. (but it would be preatty interesting how the world would be like without it and see how the world would change and how todays war would look like)