Because your reasons don’t matter. Whether or future generations keep these things is completely independent of why YOU think they’re important.
Plenty of times good things get lost in history. This is the 3rd time humans learned how to make glass. The first 2 times places got conquered and the technique just evaporated.
Good or bad, things just go away. I’m sure none of your family stories happened in the 15th century. Because those stopped being handed down at some point. And at some your stories will stop being handed down. They just will.
OTOH...if ALL books and paintings and photos, and silver and china and whatever else you claim will soon go bye bye, then at some point, like glass, will either have to be reinvented or lost forever.
Please stop telling me what will happen, beyond doubt, with my family. You don't know me, you don't know any of them, and we aren't sheep following the crowd.
But since you imagine that you can foretell the future, for all mankind...seek help; you're delusional.