Wood VS Metal - Why not an all wood game??

I am of the mind that, outside of a game situation where metal might give a person a bit of an exit speed advantage, a metal bat is mostly a diminishing tool for the game of baseball, placing its users in the gradual drift away from a professional hitting skill set. 

I, furthermore, find the penalizing effects a wooden bat to be an amazing plus.  Without early and plentiful exposure to such woeful hitting pains, we cheat our hitters. Every sting in the hands, is a step closer to a more sound hitting technique, even if it were only built on the foundation of avoidance viz: the avoidance of pain. 

Thoughts??

I am eager to know people's honest opinions regarding any cause for using a metal bat outside of competitive parity and durability.