Earlier quoted context omitted.
The actual purpose of open offices is to save money. The collaboration stuff is marketing nonsense managers tell themselves to try and ease the cognitive dissonance of lying about it.
Then the question comes: Do they really save money, or does it just appear like they do? Saving money on office space is money saved. People being distracted and doing poor work is money lost. I wonder how it sums up.
Productivity loss is hard to measure, and even when it's blatantly obvious, it's easy to shift the blame.