I don’t know what you guys have in Canada, but in the States we have the SAT and the ACT we need to take to get into college. The score you get on that, in addition to your GPA and class ranking is what determines your entrance into a university. Once you get into said university they will administer what is know as a placement test. This is when your math classes matter. The more math you know and the better you do on the test the fewer math classes you will have to take in college.
For example I took very few math classes in high school, and I payed for it later in college when I had to take pre college math courses because I bombed the placement test. It is very possible to test out of many of your math requirements depending on what your major will be and how well you do. This is the only way math classes benefit you in high school.