I see your perspective, it's a truth that male didn't have a flexibility like the female. However, in terms of sport, I think power is also important because many of sport must use power to do activities more than flexibility. For example, some research of tennis, Venus Williams and Gilles Simon, tennis serving had been recorded out 207 km/h and 220 km/h in the order. The difference between two guys is height and weight. Venus Williams, she has a height and weight more than Gilles Simon, but the power to serve is lower. So the lady is good but has power lower.