no i'm saying there should be a basic level of fluency in the material beyond regurgitation. saying every course should have people able to write a paper on some assigned part of it, or to prepare a presentation, or to take an oral exam with a previous idea of what the material will be is reasonable and essential.
i think you're making this out to be way harder than it actually is, before almost any exam i can discuss pretty well the material behind it. half the time i end up explaining something to a friend who is wondering about something. it's really not that hard.
the only thing that would make it hard is if somebody was bad at speaking and communicating effectively. but just like being unable to write well will hurt your grade in a non-writing course, being unable to speak well should significantly reduce your grade or make you unable to pass.