First - do not beat up any cave diver for the choices he/she makes unless you are an equally trained cave diver. I mean that in the nicest way, no disrespect intended to anyone who reads this. The skills, knowledge, quality of gear and mental/emotional strength combined will decide what is reasonable/risky/foolish for us. Most of the risk for the cave divers would have been finding the route to the lost boys. That would have included installing a line from open air all the way to the chamber they where they are located. Exiting for the cave divers would much simpler. We are all trained to exit a cave in zero visibility while following the line out. It is a mostly simple task. As for exiting with another diver who is out of air/gas and still in zero visibility is certainly more difficult but again something we are trained for. Now exiting with a small child who does not swim - wouldn't matter much. Don't need the young boys to swim at all. Stay focused yes. Learn how to remove and replace their reg - yes. Learn how to clear their mask - yes. They would be positioned under the right arm with most likely a long hose and regulator. The instructions would be - Close your eyes - hold on to me - I will kick - You relax and breath. Anything wrong, signal to me this way... I am not saying this doesn't have risks - but it is possible. Remember only some of the exit is in water and some of the water portion is surface swim and some is under water.