I'm an atheist as well, but I still love Christmas and family and music and lights and presents and decorations. I don't have to believe in the "true meaning of Christmas" to enjoy it, and I still consider "O Holy Night" to be my favorite Christmas song (I'm complicated haha). Bring on all the secular holiday stuff!
But to each their own. If I had grown up without Christmas, I imagine I would feel differently. And considering how stressed and miserable this holiday makes so many people, it could use some toning down of expectations.