Mathias
Wanted Pirate
I always thought it was funny that you can't shoot living human enemies with a pistol/rifle/blunderbuss. But a cannon/dark magic/literal death-of-a-thousand-cuts is fine to use on them, but no guns... albeit most Navy enemies have rifles, and seem to refuse to do anything with them but act like it is a spear.
A gun is easier to use. With a blade or blunt object you need to provide ample speed to do significant damage. With grenades or any projectile you need to adjust for blast radius (real grenades can have a lethal radius in the dozens of meters due to shrapnel). With a gun, the only concern is how to properly hold it, aim, and trigger weight.