Overwhelmingly likely to be human interference, even without "complete development of the moon's surface". Perhaps somebody thinks it would make a good museum

Overwhelmingly likely to be human interference, even without "complete development of the moon's surface". Perhaps somebody thinks it would make a good museum piece back on Earth, or some bored spacefaring teen vandals destroy it for the lulz, or religious norms will change and those in power will blow it up to show their rejection of idols of a now forbidden age. I'd give it hundreds of years, but not thousands.