No, you don’t understand. Corporations need those open office hellscapes to leverage their protective synergies, to maximize their dynamic paradigms, and to fulfill various other nuggets of marketing buzzword bullshit.
Oh, and because they don’t trust the worker bee employees as far as they can throw them, and because they need to keep the legion of mostly incompetent middle management busy so the C-level muckity-mucks can continue to stiff everyone who works for or uses the company to get fatter bonuses.