"Nothing lasts forever" is technically true, but I'm sure I don't need to point out how useless this statement is when it comes to making decisions. In situations like this fire, responders need to balance their own assessment of personal risk against the value of saving a given inanimate object.
Some people will categorically shy away from any perceived risk to their own safety, even if the estimated chance of saving a valuable object is very high. At the other extreme, some people would endure suffering and death to save what they recognize as priceless artifacts of history and culture.
