the original reason that this was important was for creating poses, hip translations will be saved in poses so unless you want the pose to move from the center position you dont want to use the hip, but if say you are creating poses where two figures need to be interacting or the figure needs to be interacting with an object such as sitting in a chair, using the hip to rotate and translate would be a good thing because it will provide absolute positioning for the figure. if you are just moving the figure around for a scene you are setting up for your own scene and not for a pose to save than its not an issue really.