cognitive breakthrough round two:
you need to have slightly externally rotated legs for olympic lifting. to help the bar clear your knees. you also need to have slightly externally rotated legs in order to use hip drive to get up your snatches and cleans.
a lot of women in particular (maybe guys with long femurs too - not sure?) have slightly internally rotated femurs when they think they are in neutral. this might be a problem more for women because of the greater q angle (because of the wider hips).
glute medius helps to stabilize the femur in the hip socket.
ya know, so you don't start developing something like anterior femoral glide syndrome (femur rubbing painfully against the front of the pelvis).
x band walks for the win!!!