This is probably more an attempt to keep celebrations from getting worse than an attempt to stop what is going on right now.
If you let them do one thing now, what will that evolve into next game, next month, next season.
It's kind of like a dress code, sometimes it seems silly to have one, but if you don't it just keeps getting more bizzare and unacceptable as each guy tries to out-do each other.
Same thing with the celebrations. They are just putting a stop to it now before it gets more out of hand, bizzare and unacceptable.
The old saying applies here: "If you give them an inch now, they will eventually take a mile"
And like I said earlier, the game would survive without any celebrations, .. just ask Jim Brown, Gale Sayers, OJ Simpson, Earl Campbell, Walter Payton, Roger Staubach, Herschel Walker, Troy Aikman ..................