You are quite right. I would like to mention that when our students are recommended as ready to practice their profession, they have before that point succeeded in all of the steps of the training.
The national exam confirms the student's studies, and allows greater mobility, so that he or she can practise in the other Canadian provinces. It's important. Such approval means that the training obtained in all of the universities is recognized.
I should mention that the universities were absolutely not consulted prior to the introduction of this exam. They were put before a fait accompli.