We used to have a thriving rail and trolley system in the US; in most major cities especially. The automakers destroyed it. When they were caught, they got a slap-on-the-wrist fine and the nation went with the automaker’s suggestion of building the highway system up.
So yes, there is a fundamental reason we can’t. It’s the auto makers and the politicians they own.
I mean, it’s supposed to be.
Probably still won’t stop future humans from opening the vault, sadly.