You do realize SCH and Astro can do as much pressure as White Mage, right? Scholar has the ability to apply Miasma on targets, reducing healing done to them. This would set back a healer by a lot, especially when Stefan is 100% right about not being able to heal through raw damage even while standing there spamming your biggest cure spells.
Astro also brings cards to the table which also can enhance the parties DPS or apply more survival.
White Mage also relies on Fluid Aura to relieve instant pressure off of them while being chased. You aren't going to be able to move and heal much as White Mage as opposed to a SCH or Astro.
If you got rid of CC for White Mage, they would be useless in PvP.
