For the record, I know it not a big deal we are talking here about specific case when a goalie screams aloud going for a ball.
Yes, the obvious situation with above explanation is clear and there are no questions ref should warn the player not to do it and card if the player does it again.
The situation described with a goalie or let's say a defender goes to the ball and screams 'I got it; is not that clear as what ever they might be screaming could be interpreted as a distraction to opposite players, just like
Grace T. was saying.
Since there is no clarity from the laws itself or some kind of guidance of how to handle and some referees might interpreted the situation one way and some with 'tradition in soccer minds - I guess I am refereeing here to older generation referees' will call it differently. So, my problem would be with possible inconsistency in making calls if a referee calls for unsporting behavior for a defender saying I got and not call for goalie saying the same thing. But, honestly, I haven't seen yet any calls like that and was a surprised to hear from here.
And thank you both for the clarifications.