A dent is much different than a 45mph crash. At that speed you have to replace half of the car. We have done those at our shop on an occasion. It’s rare as it’s a pricy repair.
It actually wasn’t far off from the “one panel” as the 5th Gen Camaro has a long panel that stretches from the bumper to the tip of the A Pillar. Otherwise it was a bumper cover, crash structure (which is disposable above 10MPH) and a trunk lid. The biggest cost was the panel.