If you reduce your argument to the merits of each unique individual hire, then you're going to miss what is a very big and complex system.

If your argument is that all 15 of these employees gained employment on their attributes completely independent of gender -- and that gender plays no part -- then it should strike you as statistically improbable that all 15 would be men.

To me that seems outlandish to ignore. Clearly there must be some biases that lead to such a bifurcated outcome.

OR your argument is that men and women are different for some reason, which led to this situation. If that's your argument then you should make that argument.