There are two Christmas celebrations.
One, the consumerist celebration where we bribe each other in hopes that goodwill can be generated with money instead of time and fellowship. A celebration supported by business hoping to keep selling product.
Two, a religous celebration that takes a historical story of God coming in the form of a human to make the world right by showing us that there is a better way and ending that story with selfless sacrifice. (Perhaps an abbreviated version of the religious story.) A celebration supported by the religious institutions that struggle to exist in the increasing complex world and/or good intentioned humans.
Maybe you need not believe in the story of God coming to earth in human form to accept the reality that we need a celebration to remind ourself that being conscientious in our fellowship with others, selfless contributing to the common good and generally not being a selfish bad person.
Maybe, just maybe, we sadly need a celebration that brings us together because our smart phones, social media and "busy" lives have us focusing, dare I say obessing, on the wrong things in life leaving us feeling hopeless in a time where the world has fewer problems than ever before.