They are definitely not oppressed, it is not like they are forced in this role in any way. Presumably to even be in the position to marry an investment banker you need considerable education of your own, it's just that maybe they chose to study Anthropology or History of Art and so they are not as profitably exploitable as their husbands.

To deny the women in question agency and not see their situation as a direct consequence of their actions is in many ways more sexist, than to actually see their situation as the result of a concious choice that is available to them because they are women, highly valued by certain types of men.