Why does the Shri Sai Satcharitra suggest that living on Earth is more valuable than attaining heaven?

Chapter 37 argues that the earth-world is of profound importance and is superior to the heavenly world. It critiques heaven as merely a place for sensual enjoyment, stating that one is destined to fall from it once their accumulated merit is exhausted. The text provocatively claims there is no difference in the pleasure experienced by Indra in his celestial garden and a donkey in a dung-heap. In contrast, the earth-world, despite its fleeting nature, offers a unique opportunity. A person who offers every action to God, even for a moment, can attain a permanent state of fearlessness, making life on earth more spiritually significant.