It's an often quoted saying that's been around for a long time.
The Sword representing the hand to hand (physical) warfare of Medi Eval.
Morphing or evolving into the Scalpel of the Medi Good. Or even the Chef's Knife for culinary.
Considering the Projectile weapon as being a non physical and detached for of warfare. From an Arrow to a Nuke? Fired from a safer position of anonymity far away.
It's obvious that modern projectile weaponry is the superior form of combat, over the very rare now hand to hand exchanges. Even bayonet charges and fighting seems obsolete.
So the blade can kill, but it can also save lives.
Can the projectile weapon have a good side of being used to save a life? At the most, I only see the sedative darts Conservationists use on animals from a safe distance as a positive life giving rather than life taking instrument.
Maybe that's the go? Just dart the nasty people to sleep, rather than kill them outright? The Snoozer Wars of the future 🥱