Foolish Immortal Path: The Child Has Great Strength

Please explain to me what it means that the underworld has been breached, mortal souls can reincarnate instantly, and consumables are endless? And what does it mean that those immortals can clean up and then immediately withdraw beautifully, ascending to the celestial realm? Zhang De doesn't understand, Zhang De is shocked, Zhang De punches fiercely! The child is foolish, but the child has great strength! ... Years later, Zhang De blocks the Heavenly Gate, grinning foolishly at the ancestors of the immortal sects before him. "You can't leave!"