My guess would be hitters force baseball pitchers to hone their craft to a much greater degree than in softball.
Developing "proper" spin, as @sluggers noted, is an agonizingly tough endeavor. If a softball pitcher can coast by with velocity and pin point accuracy, what is the impetus to spend hours developing true spin?
Developing "proper" spin, as @sluggers noted, is an agonizingly tough endeavor. If a softball pitcher can coast by with velocity and pin point accuracy, what is the impetus to spend hours developing true spin?