>>5977402>Why then, when large amounts of money is spent, it's on weird scifi looking structures with specific parts that need to be tailor made for the building?Because that's what the clients want, and because the goal of vanity architecture isn't to look good but to look technically impressive, so you can put on the airs of "look at what we had resources to build.". Consequently, the shittier the engineering decisions the better. Burj Khalifa literally can't get rid of their poop without a train of poop trucks in front of it every morning.
Besides, Labels Berlin 2 price is undisclosed, so anything is possible as long as you pull up numbers from your ass. It's also like 2.5 times the size in sqm and has 2 more floors, which obviously adds to the construction cost. Even if we took your numbers at face value, Kommandantur would be only ~20% cheaper by sqm - 10377€/sqm vs 8214€/sqm. (And it's cheaper to maintain.)
To put the cost of detailing in numbers, Potsdamer Stadtschloss took ~€20 million extra to get a historical facade instead of a modern one - and that was with some parts of the old facade (sculptures etc) being restored and reusable. You can generally add 20-30% to the cost of a finished building to add a historical or old-style facade.
And expensive vanity projects aren't most of architecture. Most architecture looks like boring as fuck squares, because they're super cheap to make. Something like
>>5977188 by contrast is a nightmare, requires specialized tradies, serious workplace safety shit due to the roof pitch, etc. Probably 2-4 times the price of a new construction in the form of a box with the same floor area.