For me, it would be that I took the class to learn formal Arabic. I grew up with non-formal/non-educated Arabic where I didn't learn how to read or write. And I would say it was actually difficult to differentiate my dialect with the formal dialect my professor wanted. I'm not doing it to pad my GPA, I really want to be fully proficient in Arabic, that's why I am taking it. Also, I might want to practice in the Middle East, so that might be a possibility. Also, learning formal Arabic helps you learn other dialects in a way.
What was your answer?