Wait. No, wait. Wait wait wait.
Are you complaining why a job would be a "second rate at everything" and only count on their unique skills? Are you actually playing? Seriously? Can you tell me the difference between what you said and: Bard, warrior, monk, whitemage, black mage dragoon and paladin? Aren't those jobs used only becasuse of it's "unique skills" while they are mediocre?
Seriously what the...