There is a practical advantage to having ground clutter on ultra. You may or may not have noticed that when you play with your view distance zoomed out to the max, you sometimes run into invisible objects that may or may not become visible as you're running into them. This is because the distance at which these objects are loaded in does not start at your character which you might expect but at the position of your camera. So in order to enjoy playing at max zoom level you need to maximize the ground clutter render distance so that you can avoid running into objects such as lamp posts or hedges.