There’s truth here. They don’t want to. It’s easier and more tried and true to just go back to what worked before wfh. Even multiple offices face some challenges working together. Always have. But usually there’s some systematic way of organizing the offices so most the function is together. As example, I’m a CFO and usually have my key teams (various teams of accounting and finance functions) in the same office. 90% of their work/communication/collaboration is amongst themselves. Being together does help.