Your friends are goofballs. The physical difference in strength and quickness between men and women is vast.
I remember when Jackie Joyner Kersee, the famous American heptathlete, was considered the greatest woman athlete. As a skinny white high school track athlete, I could have beaten her in a number of events. So one of the greatest women athletes of all time, could have been beaten by a good, but not brilliant, high school male athlete.
Tell your friends to watch some tennis. It is obvious that the women don't cover the court or hit anywhere near as quickly as the men do.