I mean, when you have already proven that you are net positive for the state, and continue doing so, requiring you to pass some exams is not rational. PR != citizenship. Will I have a bit difficulty buying some groceries in a local market? Maybe, but that shouldn't bother the state.
Also, you can live permanently without PR. PR unlocks some additional perks, which again, have nothing to do with linguistics.
Also, you can live permanently without PR. PR unlocks some additional perks, which again, have nothing to do with linguistics.