There is no doubt that a melee object and a projectile tool places power upon the user’s hands. It gives a huge advantage in the damage the user can inflict vs. being unarmed. However there is one fatal flaw with such things, and that is they can be turned against the user or the target goes out of optimal range. A tool that gives more reach becomes less useful in close range.
This can happen through a variety of ways, but it often happens when another person is in grappling range. A dangerous tool does not give someone more physical strength, and a large problem arises when a person uses physical force to attempt to snatch the weapon. The power is transferred to the other person as soon as they obtain the object. In addition, it also does not give someone defense if rushed. While a good offense is defensive, it doesn’t matter if the defense is not enough to repel an attack.