Yes, it has been a topic for years, and I think that's just dumb because it's based on that stupid rectangle on our screens which we blindly accept as accurate, truthful, etc. when it is anything but that. It's just some guy in the studio superimposing what he thinks is the strike zone and which neither the ump nor any of the players see. It is blessed and/or sanctioned by no one.
But, because it's on the boob tube, and we be the boobs, we give it credibility it does not deserve. Plus let's not forget that announcers and commentators who encourage us to look for perfection in that stupid rectangle.
I am more than happy to posit that the umpires are less than perfect on balls and strikes, but I also am fine with their human judgment and immediate call of ball or strike. Indeed, before the rectangle and the quest for perfection, commentators used to talk about how good pitchers--with excellent command--would work to expand the strike zone.