I think that German bureaucrats choose the path of least resistance. Most of the time it means giving you what you ask for.
When you get the short end of the stick, a letter from your lawyer can make it abundantly clear that giving you what you want (and faster) is the path of least resistance.
My experience when it mattered was that my rights were not recognised by the human in the loop. It was solved by going above their heads.
If you aren't willing or able you might just get the short end of the stick.