Why is music and sound FX important within games development?

It is important as it provides the game a sense of atmosphere and importance in both dialogue and cinematics, always bringing life into the games world. For example to give effect to someone falling through a window after being thrown by an enemy NPC you would then have sound effects to provide the scene a shattering glass effect and a sound of being thrown by someone, you would then use a dramatic choice of music to create a emotional atmosphere if we didn't add these factors it would make the game seem very dull and boring.