I don’t find that as a professional attitude. It is not a team attitude as well. I understand there are certain events that cannot be missed and I would work with my employees to accommodate.

However, that attitude never lasts. Anywhere I have ever managed or been an employee. It is a roadblock to promotion or worse. And you can have the attitude “that’s not my problem”. But remember that next time you have an issue you bring to your boss and they say “it’s not my problem”. They are people too that report to supervisors.