A heavy hand isn’t always the strongest. A calloused hand lacks the sensitivity to know what it touches. Justice, war, patience, friendship, and peace require information. Many tyrants blindly bring down their fists on broken glass thinking to crush an egg.
The problem doesn’t come from a failure to check first, but whether to bring one’s hand down at all. One of the key factors of combat is keeping a center of balance. Throwing a punch can offset that balance.
Fingers can feel-out a situation better than a fist. Strong fingers have grip and prove more useful than heavy fists.