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"There is always a bit of arbitrariness to the strike zone. There was when Tom Seaver or Bob Feller or Walter Johnson was throwing, too. I think it makes for a better game, rather than some version of a Jetson's type robotic umpiring crew."
Suppose Bud Selig decided to launch a clandestine experiment where the Umpires would be secretly fed Pitch F/X results in such a way that no one outside of the baseball inner circle knew. Not even the players would be aware that Bud pulled the old switcheroo.
Would you really find yourself saying "Man, these strike zones are so consistent and predictable. I find this experience unpleasant and my enjoyment of the game has been harmed."