Have to agree with you. To keep on and on about it makes no sense. Nothing wrong with mentioning to the 4th official that he did not think it was a foul or similar comments. But as you say it is not going to change the decision.
Alternatively he may be just as bored of the game as a lot of the supporters are and looking for more interesting entertainment. Couldn`t blame him for that. I mean losing all the time must get boring.