Why do coffee beans need to be "rested"?

People often ask: Aren't freshly roasted beans the freshest? Why do they need to be "rested"?
Actually, freshly roasted coffee beans are like an unrefined young man. While their aroma is intense, their state is volatile, and the flavors and oils inside haven't settled yet. Plus, at this time, they are furiously releasing carbon dioxide, and those bubbles will constantly interfere during brewing, making it difficult to brew a delicious cup. This is similar to how red wine needs to breathe and tea leaves need to age; coffee beans also need time to "mature." Let them rest for two to three weeks until their temperament mellows and their flavors stabilize. Only then will the resulting layers of flavor be at their best.