In fact, the government agencies will argue that they have zero legal obligation to clean the data, let alone figure anything about the data, and that they're just giving you the data as-is. This happened to me on a FOIA call where I was trying to get data from the county state's attorney. They insisted they could only run a specific report and that they had no obligation to run any query, meaning I can't even get access to the data I need.

Clean vs not clean data is the wrong fight.