What a goof-tastic question... I do not think that "sixism" is something Bethesda wanted to put in their game, in any form.
To answer the question:
Cyrodiil is not sixists at all, in either direction. There is no form of observable "sixism" in Cyrodiil, none.
The men and woman are equal/balanced in every way, all the way up the ladder of power (as the ES lore lays out).
..... No subliminal "keepin the woman down" content to be found.
..... And why are we comparing the video game world of Cyrodiil to Earth's history, and assuming they are one in the same???? I understand where some things are similar, but to just assume it all applies??? No good.