It’s like using literally to add emphasis to something that you are saying figuratively. It’s not objectively “wrong” to do it, but the practice is adding uncertainty where there didn’t need to be any, and thus slightly diminishes our ability to communicate clearly.
Well, since you say Christmas or not, my favorite show any time is Babylon 5.
But for Christmas stuff, Hogfather is my favorite tradition. Also Die Hard, and the Christmas episode of Justice League.