Your confused again on who wanted it and who instituted it based on the majority of the coaches request. Excessive taunting happens in all aspects of the game regardless if the team is winning or losing. Watch someone go ape sh*t when they make a tackle. In some cases it can be flagged as excessive and a penalty of 15 yards usually follows. In this particular case the HS student wasn’t winning, they were behind by 4 points if I recall. He taunted the other player and got called for it.
I mean, winning the touchdown (regardless of the overall score).
Back when the high school I went to did pep rallies, it was amazing and amusing what the cheerleader squads came up with to taunt the opposition. For example, one rival team called the Commodores was dubbed the “Commode Odors.” Nobody really cared because the razzing was mutual.
But, it may be that players have become such prima donnas now that this is needed to head off donnybrooks on the field. Sad.