Why does Chapter 37 argue that a fleeting life on Earth is more valuable than an eon in the world of Brahma or heaven?

Chapter 37 makes a powerful case for the profound importance of the earth-world over any heavenly realm. It argues that heavens are merely places for 'sensual enjoyment' from which one inevitably falls after their merit is exhausted. The earth-world, in contrast, is the ultimate field for spiritual progress. The text states that even if life is 'just for a moment,' a person 'who offers every action performed in a moment to God attains the place of fearlessness.' A place without devotion, the stories of Hari and the Guru, and the worship of God is considered useless. Therefore, the opportunity to practice devotion and surrender on Earth is infinitely more valuable than a long, but spiritually stagnant, life in heaven.