It's a RULE!
My son Kevin (18) is going to be a t-ball ump this summer.
Not an ump, actually, a "field manager."
The field manager confers with the two coaches to determine,
unanimously, if an out has been recorded.
The rules...the rules are pretty good. My favorite:
Rule 5.1: No one can keep score. In fact, no score can be kept by
either team or by fans; everyone is a winner!
Nice that one doesn't need to win to be a winner, but that just having a rule makes you one.