These are young boys we are talking about, boys who have already survived 10 days in the dark with no food.
Judging by my own small fella (16) there isin't really a lot that he could not learn with an hours training.
If'n my small fella was in that cave, then I would say "Teach him how to dive" and I would be 100% sure
that he would make it out.
The monsoon rains may come down heavy at any time and flood that cave entirely,
young lads like this Wild Boar soccer team are as tough as nails, teach em how to dive,
they will make it allright. God Bless em.