It would only further people's beliefs that a number is simply that. A number. If you put a gun to my head, I don't think Pogba would have done this and view it as a short term solution.
Changing his kit number doesn't make him better, or more of a fantasista type of player.
If anything, he has put more pressure on himself by requesting that number. This really is a high risk move for him from a perception standpoint. He has basically come out and claimed that he is ready to carry this team on his back. No one just arbitrarily takes the number 10 because its a cool number. Anyone with even a minimal amount of knowledge about this club knows just how precious that number is.