BigCos need to justify the expenditure of maintaining an office, and the office culture that goes with it: all those over staffed meetings, the HR and managemen

BigCos need to justify the expenditure of maintaining an office, and the office culture that goes with it: all those over staffed meetings, the HR and management roles that exist primarily to facilitate in-office culture, the facilities staff and so forth. A non trivial amount of BigCo roles and expenses are simply unnecessary when the physical office no longer exists. And all those people in those roles will advocate strongly for in office work in order to defend their jobs.