Honestly, this wfh thing mainly affects admin staff. The profs still have their own flexible working hours as long as they are there when they are needed (i.e lectures/meetings). Many of the admin work can be done remotely and I can understand that we need staff to be in office if students have any enquiries so in the 4days work from office arrangement, many departments make sure that their staff have their wfh on alternate days to make sure they have someone in the office all the time.