I never understood this argument. Most companies do not own their office buildings, but rather lease space from corporate landlords. It is in the best interest of these companies to dramatically reduce their lease burden via WFH. Why would a company totally unrelated to real estate investment act against its own self-interest just to prop up real estate investors?
The argument (which may or may not be valid, just explaining it) is that companies do not lease space (or take any action), people do. And the same individuals who are able to make leasing decisions for office space are co-invested in commercial real estate; even if the company doesn’t benefit from maintaining an expensive office, the C suite might; and if so, then of course that’s the decision that will be made.