It is a University's job to educate students, and to expose them to many fields of study that will give them a grounding for later study and inquiry. Basic instruction in many different topics at least gives the students enough grounding to ask good questions.
Education in foreign languages has far reaching affects on many aspects of life and cognitive abilities - this is a documented fact. The analogy to Exchange is broken in many, many ways. Training on a product only brings some level of competency in that product, as soon as it end-of-lifes, the skill is useless. Learning a language opens many doors, and I don't really see German being end-of-lifed any time soon.
Perhaps every university doesn't need a research oceanography unit, but it sure would be nice if they provided at least a teaching unit or two on those. Or do we just tell the students that would like to know something about it, "screw you, enroll at these other universities too, if you want to learn the basics of that.". I understand that in the Netherlands, this may not be that difficult, it is a small country, but in many places, e.g. the US where UVA is, the college where they kept an oceanography program is probably sever hundred, or even thousands of kilometers away.
Finally, the basics of subject do not need leading experts to teach them well. For low level classes, most people capable of getting a Ph.D and an interest in teaching can cover the material quite well. In fact, there is a whole school of thought (with pretty good evidence) that suggests that experts can't teach novices a subject very well at all. (this is known as the tacit or expert knowledge problem).