I agree. The cards and other media images can trigger much sadness and sometimes despair for some people, including those bereaved or socially deprived. I also agree with n&g that it can be a very special time if a family has a good and close relationship and practicalities allow. It has a deeper meaning for some, but not all. It's a polarising time like no other. I don't think anyone here assumes that Christmas time is the same for everyone, we just reflect on our own situation in awareness of our uniqueness.
For myself I love the lights, lifting the darkness, the traditional cake baking, the chance to eat food that I like but that is not necessarily traditional, the excitement of children, the potential for quiet and reflective space, choosing small, special things. I thoroughly dislike commercialism and the media pressure. Some close family work in retail, they are exhausted by it all and have just one day away from the workplace. It impacts on us all but we manage something lovely together at another time and plan what is possible. Our family traditions have evolved and are unlikely to ever reflect the traditional images, a bit of me is saddened but there is much to be grateful for.