Your answer is in your response, you just don't see it. You are in support of what you are used to.
Beyond being used to it, it offers value in that, when you ARE used to it, you know the position of the player based on the number. Hey, 53 is covering 80. That's a mismatch. I get that not everyone does that, just like not everyone uses TV numbers to ID players. Because any one of us don't make use of a tool isn't a good enough reason to be opposed to it.