Yes, females do not have the upper body strength that men have, nor the oxygen efficiency inherently. It's just how we are wired. However, if I'm not mistaken, the world record for lift vs. bodyweight ratio is held by a woman, even though it's not a world record weight unto itself. I think she was like 175 lbs of nothing but muscle, and lifted 400+ pounds. So again, we're back to potential not being equal to capacity, simply an advantage.