If we were all using normal weapons, perhaps. But those who turn into Weapons are not ordinary weapons.

[how to explain.]

In my world, our souls actually hold a lot of power. Those who can wield Weapons are called Meisters. When a Weapon and Meister work together, they are actually amplifying their soul wavelengths and therefore their powers, creating a more powerful team. One pair can potentially act as a whole army of normal humans.