Diversity of background usually means that a single person has a breadth of experience (many of us have this i agree), but thats not what the issue here is at all. We dont have diversity of background in the sense you mean because we all mostly come from the same type of family, with parents that push us to succeed academically. Whether we choose to admit it or not, skin color also really is the issue because it is heavily intertwined with socioeconomic status.