I've found that one easy way to stop a feminist running the usual "moahr wimmins" line in her tracks is to ask her to explain, specifically, how more vaginas will improve whatever situation she is complaining about.
"So, precisely how will having more vaginas in the immediate vicinity improve our sales?
"Do vaginas make people smarter and more productive by mere physical proximity or is it some sort of aromatherapeutic performance enhancer?"
"Will we generate higher investment returns in proportion to the additional number of vaginas involved?"
It's rather amusing to see how they can't even begin to make a case for it. The exception, of course, being a society with insufficient native vaginas giving birth to children. In that case, it is a real and serious problem to which "moahr wimmins" being encouraged and incentivized to do so is a legitimate solution.