Comment by dylan604

I think you're misunderstanding why they are requesting an SSN. You cannot use an SSN to do an in person ID like a photo ID. Same reason a birth certificate cannot be used as an ID. These documents can be used to look up information about you, and a lot of places might use your SSN as a database unique ID, but that kind of info is not identification when someone shouts "papers!" at you.

conflating the two meanings of identification feels deliberate at this point