What are obliques good for?
The oblique muscles are tasked with a variety of functions. They help you bend your torso to the side, help rotate your torso to the left and right, and perhaps most important, actually act to resist your torso from rotating, which helps to stabilize and protect your spine.
I believe they are a very important part of the swing, I also believe you swing from the ground up.
Yea, and as we can see they can be used incorrectly.