Class changing, are we unique?

[Morningstar1337]

Also basic Conjury (specifically, healing spells like Cure and Esuna), is stated as being a core skill taught to many people as a form of first aid regardless of what Discipline they normally hold, particularly in Gridania where it regarded as being essential for survival in emergencies where a CNJ isn't always available.

I wonder if that explains why Cure is a common cross-class skill for classes (Not Jobs)