Music is important for life, it is because without music, the life didn't exist. The nature itself is a music. The sound of the falling rain, is a music. The song of nightingale, is a music. The voice of cuckoo is a music. There are many poems about music in the literature world. Tamil poet - Bharathiyar, and many others said about the sweetest things of music. William Wordsworth had said about it.
We will listen to music when we are depressed, and we also listen to it, when we are in a happy mood. We listen to it, when we feel something is boring. We listen to melodies, rap music, etc...
So, our life runs because of this music. Therefore, music is important for our life.
Hope this will help you.