Well, like most things, it is both an advantage and a disadvantage.
Advantage, because if you have expertise in the content, you can focus on how to present it, rather than on understanding it. You will be more confident of creating innovative learning designs for the content. You will also be able to bring out nuances and insights that only come from content expertise.
Disadvantage, because if know a subject well, it will be difficult for you to imagine not knowing it. Since you yourself don't go through the process of understanding the content, you may not be able to visualize the learning process. It will hurt your ability to create an effective learning design.
Advantage, because if you have expertise in the content, you can focus on how to present it, rather than on understanding it. You will be more confident of creating innovative learning designs for the content. You will also be able to bring out nuances and insights that only come from content expertise.
Disadvantage, because if know a subject well, it will be difficult for you to imagine not knowing it. Since you yourself don't go through the process of understanding the content, you may not be able to visualize the learning process. It will hurt your ability to create an effective learning design.
