A person who became injured, disoriented, or physically incapacitated in the deep sections of Hourglass Cave would be in serious trouble within hours.

The darkness is total.

In a cave this deep, at this distance from the entrance, no ambient light from outside reaches the passages.

A person who extinguished or lost their light source would be unable to see their own hand in front of their face.

Navigation without artificial light is impossible.

To reach the location where the bones were found — roughly a thousand feet from the entrance, deep in the cave’s dark zone — a modern caver with full equipment, a good light, and the assistance of team members requires sustained effort.

It is not a casual excursion.