At least for me, music is an important outlet... it's one of the reasons I can get through the day and can keep myself sane or feel some measure of happiness. I seem to write my best songs when I'm inspired and am emotionally uplifted or when I'm hurt or despairing, IMO. I express myself through many stages of my life through music and my tastes in it evolves along with me. Sometimes a song or an album will resonate with me so well that I will feel less alone in the world and cheer up or I might cry because someone else feels the way I do.
Perhaps music isn't necessary for survival, but I think it's helped put a little light in my world. Has music helped you during dark times in your life too? If the question is too personal then my apologies.