Every square footage of every home costs $$$ to keep in your possession. I pay a mortgage. I pay insurance. I pay taxes. I pay maintenance costs. There were acquisition costs in the purchase of it, and there will be acquisition costs wherever I go next. Not one square inch of my home is "free".
Suddenly that simple answer isn't so simple when actually confronted with reality, unless you're willing to be homeless and just carry your possessions in your hands.
I have to regardless of a storage unit or in a closet in my house. That closet in my home and that shelf in my garage isn't free either.
So then it's just a question of owning anything at all or nothing, because it all has a life long recurring fee for the privilege of continuing to own it. And yes, my family finds value in decorating for holidays as a part of celebrating, remembering, and keeping traditions alive.
Sometimes people don't just want to live in the same IKEA box 365 days a year.