What did you tell him about your use case?
I'm asking as I don't agree on the underlying assumption a use case was needed. I consider the value of transparency and public information for a democratic society as evident.
The question might not have been about the transparency, but more about the choice of having it as a git repository, or whether there are actual tools based on the git repository. Arguably, the git repository is unusable for the majority of people, so it cannot be an answer to transparency in itself, some user-friendly tools based on it might.
I'm also interested in the response btw :-)
I just want to archive the "official" XML files since the "official" website does not provide an archive. For that reason, I also don't change the XML files: The spec is available and everyone can build their own transform (to JSON, XML, whatever) based on their particular needs.