According to the text, why is the Earthly world considered a desirable place for those seeking Self-realization, compared to other realms?

While one might assume higher spiritual realms are better for enlightenment, Chapter 17 explains a different perspective. It states that worlds like the Pitru-loka, Gandharva-loka, and others up to Satyaloka, while attainable through various means, offer a very unclear vision of the Self. Therefore, those who genuinely crave the vision of the Self desire the Earthly world (Bhuloka). The text clarifies that here on Earth, the 'purity of heart occurs, and the intellect becomes clear like a mirror,' allowing the pure nature of the Self to be truly reflected. The only other viable place is the world of Brahman (Brahmaloka), but attaining the vision there is described as extremely difficult.