The strawman is strong in this one. The Roberts steal was exciting - and it was a call at 2nd base which the human ump is best equipped to do in 2016 with 2016 tools. There are all sorts of those calls each game - and the umps do a marvelous job with it. Ball and strikes - the umps cannot do it well. Every game, there are pitches right down the middle called balls, and pitches at the shoetops called strikes. The umps try, but they have to use lazy crutches, like relying on the catcher's position, to even get it to "consistently wrong". Giving them some meaningful help in the 12.5% of their job (since an ump works the plate 25% of the time) part of their job that is the most difficult and most frequently botched. I see you are making a bit of a slippery slope argument - where does this end? And this is true - since if technology allowed plays at the plate to be called correctly then hey, whaddya know. But that stuff is cost prohibitive, and has not been proven. The Pitch F/X technology is actually far enough along to use in real life.