Why is sound so important in film?

Many may see sound as the most important factor in a film. It has been said that sound creates emotion and connects the audience. A real sense of joy or upset can be felt.

Patrick Drummond a sound editor has said:

Can you imagine Jaws without that score? Apocalypse Now without its bombastic, visceral sound effects? Psycho without those grating strings as Janet Leigh is mercilessly knifed in the shower? Sound is undoubtedly a vital element of film production, but does anyone actually acknowledge this? From Jack Foley’s first tentative steps on The Phantom of the Opera and Dracula in the mid-1920s and early 1930s, to the highly developed sound editing of masterworks like No Country for Old Men and the scores of the Star Wars films, sound is integral to the film-going experience, but is not always treated as such.

This sums up the fact that people undermine the power of sound and how it plays a vital factor in creating suspense and emotion and this doesn't only apply for music it applies for all types of sounds from sound effects to soundtracks.