It's important to remember that the building itself was never entirely static. It took hundreds of years to build. The famous flying buttresses were added during construction. It was modified over time. It was attacked in political and religious upheavals. There was a major restoration in the 19th century. The spire that collapsed was added in the 19th century. Only one of the rose windows, as I understand it, is "original." That's to be expected in a building that's "alive," that's in daily use rather than a static monument. Because of the restoration, a lot of statues, artifacts and decorative elements had been removed before the fire. This seems like a chance to combine ancient skills and modern skills and rebuild it for another 500 years. It's sad to think of the wooden timbers in the roof, possibly themselves a 1000 years old, all gone. But the framework is intact. The Cathedral is a symbol of the idea that people can be more than just animals grubbing in the mud for a narrow living. It's a symbol of aspiration and accomplishment and inventive genius.