My other related question; why did they survey only females? It seems like a report of combined and gender separated statistics would have also served the same

My other related question; why did they survey only females? It seems like a report of combined and gender separated statistics would have also served the same purpose. If (as I suspect, but we have no numbers to back it up) females are disproportionately targeted by VCs, wouldn't this have made a stronger case than surveying only women?