I completely agree with Mr. Sheikh on our role.
However, I would be ready to provide you with examples where, as a statistician, I could question the quality of data, especially data on new immigrants and their economic integration in Canadian society, or on aboriginal people. The census is almost the only source of information on their level of education that allows us to find out whether the gap between the Canadian population and aboriginals, as a subset of the population, is growing or shrinking.
Those are just two examples, but there are others where, as a statistician, I questioned the quality of data.