Okay, I just need to sort this out in my head, you're saying that a white mage, with an ability to make their attack spells more powerful being part of their skillset...should not need to use said skill to make an attack magic skill more powerful because...reasons?
Seriously, any whm attack skill should be buffed BY cleric stance, it's just the way it is and it makes sense in lore, to attack, you give up a portion of your ability to heal, why provide no drawback to use holy, which is already a very powerful skill by removing that? whm skill or not, you forget that the base of your class is essentially a druid, not the classic white mage from other ff lores, it's not light based magic, it's elementally gifted abilities.