How can we say up front what we'd learn about a dead civilization? That's a kooky premise from the git-go.
We have plenty of records from our civilization. Typing is a lot easier than etching into stone. There are not all that many records of what the Romans were like, let alone actual physical artifacts.
Not to be contrary, but I believe that may be an overstatement. I believe there is abundant records of the Romans life in Italy as well as archaeological sites
If there is any value in the Spanish site , it would be how Roman culture impacted the Spanish culture.
It seems the Spanish politicians don't really care about what happened in the past.