The issue with most PI call is they are judgmental

I can't imagine a PI call will be challenged by a coach. How does a ref decide there was no PI when it was called? And I would bet that PI non-calls will rarely be challenged by coaches since it is so judgmental. The "call on the field" will undoubtedly prevail.

This is strictly a rule put in place as a PR ploy because of a once in a generation embarrassment. Funny thing is I remember discussing that play with folks at the time who thought the non-call was absolutely correct-- that "the ball wasn't catch-able so how could there be PI" kind of stuff.