why? I am talking to a group of female teenagers. I want them to feel adult. I start my rant about their last stunt with "you are not children, you are women" (that is my imaginary context) , but important bit is - I am addressing a group of women (at least two).
Now I understand. When I saw the sentence later in that lesson in English, I was able to see it in the correct context. I was confused because I thought I was addressing one person as "women", instead of a group of women. Thanks for explaining, immery. :)
It works but I think more often we would say "you guys are.." or "you all are.." in a more relaxed environment. "You are women (!)" Works for a more urgent / angry situation, in which case, your example is spot on! :)