Just because we now call it yule (or Christmas in English speaking countries) doesn’t mean it’s no longer about the solstice/winter season like it was for thousands of years. Christ gets near zero attention for Christmas in my country. I’ve NEVER seen a nativity scene IRL.

Christ is just a later addition to a much older tradition for a lot of people. Not even an important one. Of course that’s for us atheists and pagans, not Christians.