So you're asking why a hybrid job would be able to get buffed for both types of damage like they already should? You know that 15 mab could do more for a mage than 150 atk for a melee right? Why would they do that anyways, it would be an easy way to upset a lot of players to weaken a buff meant to allow more people to do events.

You know the acc requirements for several high end fights are utterly insane and require several support just throwing all their acc buffs and eva down debuffs on a mob just for melee to hit anything right? A mage can pretty much cap macc on anything by themselves with gear alone I believe. A melee is short about 500-600 acc alone on the most evasive monsters