When I first became a Black Mage, I was hype for the spells I would get. The master would teach me ancient magic that was so powerful, that the realm banned them as a whole because they were a threat to life itself. Needless to say, I was let down. Barriers? Why barriers? Thats like giving a White Mage the ability to summon a frog so it can ride it. Yeah its nice but its completely out of place for that class.
Alright! Freeze and Flare! Time to destroy my enemies with spells they've never seen before-- *Sees an NPC cast Flare and Freeze* Oh. So... Wheres my "forbidden magic?" Is this a joke? Are the other laughing at me when I leave? Or are the barriers the only forbidden one? Forbidden as in when the Black Mage cast them and everyone laughed them out of town, so they banned it to save them from humiliation? If Freeze and Flare were banned they clearly arnt banned anymore. Black Mage just feels like a hipster "I was using those spells before it was cool"