Statistically the called zone is wider and shorter than the rulebook zone.
For the spectators that looks bad because wide calls can look worse but Statistically this helps the hitters, low and high creates more swing and miss than in and out.
I looked it up on statcast and in an out pitches outside the zone create about 30% whiffs on swings and low and high about 60%. This could be an issue with robo umps, you don't get that occasional in the other batters box wide call but you get a lot of calls just at the bottom and top that get called.