There are several reasons.
The main reason is probably that in French Ontario, we don't have the institutional maturity of post-secondary educational institutions in Quebec, where three major English-language universities and several CEGEPs have been established for a long time. In Ontario, we are still in the process of creating the first autonomous French-language University.
There has been significant investment over many years in the English-language system in Quebec, whereas here the story is very different. We haven't followed the same path or the same trajectory.