It depends on what the course is geared towards. I think most, if not all, music majors at university hope to win an orchestra audition. Therefore, it is helpful to get the input from someone who plays this repertoire every day. At the least, the students should be able to get master classes from someone in the field so that they can learn how to function in an orchestra and an audition. The audition weeds out anyone who does not know how the excerpts go, so if your teacher does not know, then you are at a disadvantage.