I didn't say that every job in melee range needs to be self sufficient. I said that Red Mage specifically should be mostly self sufficient (if it was wholly self sufficient then that would pretty much make it severely overpowered in solo situations) because of the fact that it would not be seen as a damage dealing job, and therefore the public opinion would be against having a "useless" job taking extra damage in melee range when it should just be sitting in the back lines casting refresh and haste.