I sort of wish players could only choose one job.

[Charismatic]

That would be like me, as a white mage wanting to be a DD because I have elemental spells. Making me a black mage, despite the fact that my arsenal of abilities suggests otherwise.

The spells you decide to use with them, doesn't change that the abilities unique to them classifies them in a job. Heck, even the wikis reference the characters with these jobs. You're simply trying to split hairs.

So... a character having all of the abilities of a White Mage doesn't make them a White Mage.
You heard it here first folks!