Talking about balance is what gets things fixed. There are quite a few issues with scholar which do infact put white mage reliably ahead of them in terms of healing output. Yes scholar has things that whm doesn't but the issues with scholar make it so that in a group I would gladly step down in place of another whm if it meant we could more easily finish an objective. This is a bad thing for balance.
It isn't about wanting a class to be unstoppable as it's like you said I can always swap. That said just swapping away from a poor pick instead of trying to work it out is what pigeon holes the game into 1 tank, 1 healer, 1 melee dps, 1 ranged dps which is again a bad thing.
