Quote Originally Posted by Betelgeuzah View Post
They are still linked to the classes they originate from. Plus, they complement each other. They are not separate.
And yet you didn't comment on the actual meat of the post. You're right they are linked but they are also different things entirely. A thaumaturge is not the same thing as a black mage and vice versa. The lore may require those interested in becoming black mages be well versed in the ways of Thaumaturgy but when they are classified as a black mage they are something completely different. The only link between jobs and classes is that one transitions into the other in some form.