The song 'Why Would You Wanna Live?' by Wilco explores themes of existential questioning and searching for meaning in life. The lyrics reflect a sense of disillusionment and introspection, pondering the reasons for continuing to live in the face of life's challenges and hardships. Key themes include existential doubt, introspection, and the human condition. Poignant moments in the song include lines where the protagonist expresses deep emotional turmoil and questions the very nature of existence.