I umpired youth baseball for a few years about 20 years ago, give or take. I was great on the basepaths, saw everything, had that eye.
I sucked behind the plate, I could see the corners and the high zone fine, I absolutely had no idea what was going on in the low zone. When I tried to compensate to get a better read, I lost the corners and the high zone.
So I didn't work the plate much
I also had no problem admitting if a I didn't see something. I remember an AAU coach screaming at me because he said the batter missed first base. I was watching a diving play on the ball hit into the deep gap. I told the coach I can't call the batter out, I didn't see him miss first base. The coached laughed and went back into the dugout