The Serbs were rather better at cover and concealment than anyone in that movie. And that certainly doesn't prove unguided carpet bombing would have done better. If you're bombing a decoy then you might as well bomb it with a single plane dropping a single bomb. . . rather than 100 planes dropping 1,000 bombs. . . and still missing the decoy! Your time argument is ridiculous by the way. Firing a single nuke, or launching a couple of fighters armed with PGMs could be done in a fraction the time it would take to generate a flight of B52s for a carpet bombing run. And again, you're postulating WWII tactics, which is NOT how the modern US military is trained to fight, and has practiced fighting for the last decade in two wars in Afghanistan and Iraq. The reason they do it in the movie is because most movie makers don't get modern all arms tactics (and even those that do often avoid them, because they're not terribly dramatic), and have a habit of just reverting to WWII whenever pressed.