the reason con wont unlock blm later is because,
they want to make people have roles, and will force all jobs into these roles, while con could be a sch, they will make it blm or whm because they want dedicated healers, and they will alter the only two mage classes to the roles they want now.

really they should add blm and whm later and make like scholar and oracle, but they wont, they want pure roles now, and will alter the mages to be that, even though its probably a bad idea on a number of levels