Engineers and doctors are a restricted profession because those professions can kill people when exercised outside the norms and regulations we are accustomed to in Canada. Being an “engineer” in another country doesn’t automatically grant you the right to call yourself an engineer in Canada. There’s more to it than just education on paper. Engineers and Doctors receive training that is specific to the practices, codes and regulations and expected in the Canadian market they are expected to practice in.
Retraining those professional qualifications for an immigrant is really complicated. We would basically need a dedicated school or two specialized in skills transfer And recertification for hundreds of different countries across dozens of different diplomas. Plus the immigrants would need to be willing. And who’s going to pay for that? I think our educational funding should be prioritized to Canadian students first.