>Not American but wasn't the goal of affirmative action to give access to opportunities from the majority (white-Americans) to the minorities?

Officially speaking, no, as that would be blatantly unconstitutional if done by the government (including public universities), or illegal if done by private organizations.

The official justification was that having a diverse student body provided a benefit to the entire student body; so an underrepresented student actually provided more value than an otherwise equal over represented student.