But then youd have someone complain that the ump should have let the coin hit the ground instead of in his hand
Correct. As an umpire it does bug me, too.
Why do we let the defense ask but not the offense? Why is my angle so much better based on the person asking?
That said, I think the answer is to eliminate the ask altogether. Why do we allow it for this one very specific microscopic instance?
Yes, the plate umpire can deny the request … but not in every code.
Check swing for strike three to end the inning with people advancing? The umpire realizes he messed up.
I am not sure of the meaning of your post. I am also not sure why "the umpire realizes he messed up" and I take a little exception to that. Perhaps the umpire made the correct call from his point of view and it looks different from 72+ feet away at another angle. So which one is right? Why should that depend on the person ASKING not the person ANSWERING?
You want to know something? EVERYTHING looks different from 72+feet away and from another angle. That's why we try not to make calls from that distance or from bad angles. Why do we allow one team that potential advantage but not the other?
The simple answer is "the rule says so." As to why the rule allows that when every other rule in the book seems to written to bring parity and fairness to the game ...
From an umpire perspective, I can agree, on one hand, that it acknowledges that an umpire has to be watching many simultaneous events. However, that is true on every play, so why is this one so different?
Edit to add: If runners are advancing, I am watching the runners, not a request from a coach who didn't like the call. I have a live ball.
when a home plate umpire calls a strike on a check swing but then he immediately points to first.