Used Pitching Machines Why Don't Team Use Really Good Pitching Machines, Instead Of Overpaying Pitchers? ?

Why don't team use really good pitching machines, instead of overpaying pitchers? ? - used pitching machines

Change and can be controlled by the receiver or manager. You can 100 km / h to continue for what makes the game more competitive.

In addition, the HI-Tech contains up to very high.