Because the female body is different from the male body. A fit medium build athletic build woman is different from a fit athletic build man. None of those outfits would look cool or natural for a woman to wear. It's not as simple as swapping out a face.
What is considered "cool or natural" is based on an individuals personal tastes and experiences. Personally I do not see any problems with a woman wearing any of the outfits that have been shown thus far.