Art & Culture in a truly agnostic or atheist society?

I am curious about what everyone believes what we should truly evolve into if we completely, in an ideal world, excised religion from all society & culture and relegated it into history.

For example, virtually all of our foundational art and culture is derived from worship, going back thousands of years and including religions that are defunct. Architecture, major artistic works, music, clothing, even food is influenced by it.

What happens to those things? What guides our inspiration? What are our new holidays? Or do we keep our existing ones to reflect on what was?

It’s a serious question. This is why I feel we can never truly remove it. We can stop worshipping and letting different interpretations of text guide us in everyday life, but these remnants will always exist. Not unless we forcibly destroy them, and I don’t see that happening. Things which are classic will always have value to us.