Not ez specific, could be any airline. Last time I was booked in for an operation at my local hospital it was weekdays only. Last time I wanted a plumbers/electricians/doctors/gardeners visit it was weekdays only & 08.00 - 17.00. Last time I wanted a chat with a CP/HOT/CEO/MD/CFO etc it was week days only 09.00 - 17.00. No discretion on their behalf. It was a NO NO. Unavailable. Last time I wanted time off for a dentist/doctor appointment it was not allowed if it disrupted the roster pattern: use your days off. Single days off for a wedding; not allowed. single days off for a school kids performance; not allowed. etc. etc.
Reap what you sow.
If you want give & take it needs to be by both sides in both directions. It is not; so don't be surprised when someone spits the dummy. It shouldn't happen, but where is the root cause? The subject is not so simple as to have only one finger pointed in one direction.