Don't try to bring up biology as some sort of excuse for this behavior when our closest relatives are matriarchal, and our ancestors have been cooperative breeding since before we were even anatomically modern human. Not to mention we posses the ability to rise above our base instincts and apply thought and reason to our actions. What you witnessed was not a biological predetermined truth, it was a social construct.
Don't "suck up" discrimination, stop this 'man up' attitude.
It's also pretty fucked up to infantilise women like that.