Im not a manager but im just struggling to see how you habe such a narrow view of work that you think its that linear. Most roles do require inter team and department cooperation and in those cases it's nice to be able to check teams and see if someone's in the office because then you can go talk to them directly.
Why is knowing if someone is wfh or in office such a bad thing to you? Also where someone is is not irrelevant there are plenty of restrictions around work locations.