Tooooo much assumption going on. Women as warriors? Not.
Your statement sounds like an assumption.
There were many cultures who had celebrated women warriors. For one example: Bodacia, (Boadicea) who carried out one of the biggest defeats against Rome...
...
and here's a link to the profiles of some other historic women warriors -
http://ancienthistory.about.com/library/weekly/aa032703a.htm
..Why would we assume there were not women warriors in ancient Mesoamerica? Especially in light of their own artifacts?
There is a very good reason why all the civilizations in which women were the warriors are no longer around.