Why should TC lower standards for the 2 or 3 models that manufactures who did not put sufficient engineering effort to comply?
consistency, my mate. consistency. Why bother spend extra $ to develop bumpers just for North American market?
Besides, as NAFTA allows folks to get cars from Mexico in next 10 years, it disallowed Canadian government to put restrictive measures on these vehicles, which may not be CMVSS-certified. So for Canada, it's fix-it-or-die situation as the country must honor whatever it agrees in NAFTA.