Posey,
Obviously, I have a great deal fo respect for your talent if you are/were a softball Olympian. That said, look at any slo-mo video of ML or high level D1 softball hitters and you WILL SEE hips leading the way. It's kind of incredulous to me that you are saying what you're saying. I guess it shouldn't be though.
We're not torquing the hips or spinning the hips, but while the hands/arms/upper torso loads, hips lead the way. If anything, the core is being torqued as a result creating stretch reflex. Yes, when you throw a ball, hips lead the way. Check it out or better yet, go outside and throw a ball and see for yourself. Hitting is a lot similar to throwing and hitting a golf ball.
AND, because women do not have the upper body strength of men, it is that more important that they do use their CORE to help generate power. Are you talking about arm swings?
Mark and I disagree on some points of the swing, but on the overall, big picture things we are in agreement. Mark, I may need your help here.
Mike