Whenever something convenient in germany is not possible, you can bet it is a insurance thing.
Leave the windows leaned open so it cools down in the office over night? Impossible due to insurrance. Somebody dies from overheated office and you want to sew the insurrer who enforced this ridiculous rules even on the third floor.. impossible, due to..
And the insurance conditions are based on DIN/EN, VDE, TÜV and others. If you have bodies that create rules, they will never stop creating rules because it is their job to create rules. Something that started great to reduce unnecessary harm became a red tape monster slowing down everything.
Nobody gets elected or paid to reduce that in a sane manner (not: Chainsaw, Doge)