I see this a lot living in Asia. It FEELS like (just my feeling, pure psuedo-science) old stuff isn't as valued as it is in Western Cultures. Like, I was just in Bhutan last week, and many of their temples were built in the last few decades. In Thailand, building that are older than a few years even are referred to as old. Occasionally they'll proudly show something that's centuries old, but I can never tell if they actually care, or if they're just selling what westerners want.
But... there's a million reasons for it too. Like, maintaining really old buildings or art is a privilege and a luxury that only rich countries really have. As well as, for someone living in a small village in near poverty, worshiping old things looks kinda stupid. And, to some extent, I think western civilizations are more centered around objects as well, whereas for these cultures "what" happened in a place is more important. Like, you'll rarely find anyone care about where a Buddha statue or painting was made, or who made it. They care about the place its at. "Here's where whats-his-name faced the Demon-whats-his-name and defeated him. We come here to pray for strength." etc.
But uh... I know nothing about this Chinese thing. Maybe its different.