Knowledge is power.
In some places, we have shift works and people will come in shifts and work. We used to allow people to change mutually. That means a person who has to come at 6 AM can come at 2 PM provided a person who has to come at 2 PM is coming at 6 PM. Employees used to exchange their shifts and acceptance is given by them in writing and the management is allowing them to come in shifts. Like this, we may have to accept the flexible working times also if the work is not getting hampered because of the facility provided to the employees.