Why is the appeal to first base necessary for a check swing ruling? If the batter went, call him out

it’s weird how the catcher or pitcher needs to make an appeal and the home plate umpire needs to approve that before the first or third base umpire can make the call. 

just give me a robo ump to make all the calls. it’s faster, more accurate, and every stadium has enough cameras to do it all.

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i can’t wait to see aaron boone to find a way to argue with a robo ump and get tossed