"....But because most of the children, whose ages range from 11 to 16, cant swim, the easiest rescue option would be to keep pumping water out of the cave.
Yes. Pump like crazy and let the kids walk and crawl out the same way they got in. Not as glamorous but the practical way to get them out.
Trying to drill a large bore hole to some location? That has worked in the Western world where you have good engineers, the equipment and the resolve to do it right. These will be Thai drilling crews doing it so based on my experience I would not bank on a good outcome trying to use a technical solution to the problem.
Pumping water? They can do that.
Looking at the maps that BBell posted, I suspect the problem with trying to drill to the trapped kids is not the competence of the drilling crews, but getting their rigs safely above the cave system. Building the road and platform is likely a couple of week effort after you have determined where to drill. It also sound like the cave system is at best partially mapped meaning that determining where to drill could take some time.
It's actually the Cajun Navy...