If somebody builds a car whose entire purpose for existence is solely to kill or maim, then sure I'm all for banning it.
There has
never been a firearm built “whose entire purpose for existence is solely to kill or maim”. Never. Not one.
That's incorrect. Guns are made to kill, maybe in the name of defense but their purpose is to kill.
No, they are not. They are made to propel a projectile to a target. Tens of billions of rounds are fired every year and a vanishingly small number of those are directed at either people or animals.
Yes, thankfully. Your firearm is designed to kill just the same.
No, it isn't. Based on your rational then cars, which are far fewer in number, and kill far more people were designed only to kill. In the USA there are over 300,000,000 firearms, and they kill (through all reasons, legal, and illegal) 30,000 per year. There are 263 million cars in the USA and they kill 1,300,000 per year. So, based on numbers alone it is clear that cars are only designed to kill people because they sure do it a hell of a lot more.