theory...
baseball is full of theory.
in theory, a batter at high levels is able to pick up the ball at a better angle from a pitcher of the opposite hand, and read the spin...
(and he does not feel the urge to bail out so much)
there are no absolutes.
growing up, I hit lefty only situationally, as I had no pop from that side, but could make consistent contact, and bunt.
bunting lefty, you are already moving to first as you drag the bat behind you.
(it helps a slow catcher to beat out the throw)