Pose a question, expect a no-nonsense, factual answer. Don't be offended but appreciate the candor and brevity. Get back to being productive so you can leave for a timely Feierabend like everyone else.
To be fair, this would probably still be considered very unusual in Germany. You're not obligated to do a while song and dance, but uf you do this I would assume it's a very deadpan joke.
I was watching a YouTube video for Americans on what not to do when visiting Germany. I was thinking that I would love to live in Germany throughout the video for the reasons you stated.