I believe the Quecreak miners were trapped 73 meters below the surface. These kids are trapped over 800 meters below the surface. A better example would be the Copiapo mine rescue. In that case it took rescuers two and a half months to drill down 638 meters to reach the miners. To drill a rescue shaft down to this cave could take at least three months. It could take a lot longer depending on how many exploratory shafts they would have to drill before they hit the cave. By that time the rainy season would be over and they could just walk out.
That said, I think they should get started drilling a rescue shaft anyway, just in case. But it would probably be a waste of time and money. I'm not sure if they have the funds for it or not.