I don't think it's good science to say that every difference comes from discimination. For example, the poorer you are, the higher are your chances of dropping out. This is not discrimination against poor people. But, at least to me, this is a problem that we should try to fix.
Figuring out whether or not there is discrimination is not saying that any differences comes from discrimination. Identifying differences is the first step in doing that, not the last step.
