I recently saw someone on Lemmy point out that the UK has an emergency plan to move precious artwork to bunkers in the event of a nuclear attack, but no such plans exist for the people. Paintings can be replaced or remade. People cannot. The planet cannot. There are many things in this world far more valuable than art, in part because life is the source of art.
I think an important consideration is who gets to decide what knowledge and culture get preserved. For example, I would say that medicine, agriculture, and human language would be much more important to preserve than computer science or economics, but I’m sure someone would disagree.
In general, I think art is very valuable and should be protected when possible (and not just European art), but if the choice is between a painting or a human life… the painting goes every time.