No actully it was written by the authers of sw vehicles, Dr. Curtis Saxton PhD in theoretical astrophysics, and Kerrie Dougherty Curator of Space Technology.
Just because the person writing it know far that is, doesn't mean ISD's can realistically fire that far and still be accurate. In fact, given the apparent speed of turbolasers you'd have zero chance of hitting anything short of a planet at that range, because they travel slower then light. Even 5 light seconds is too far away to accurately target something.