Agree. Had he been in Indonesia it would have been legal. It is only US based people who seem to be crying foul???? Or people who have not seen the real world.
Even if they could swim, children would jump into the water not knowing or realizing there is no way out. I.e. a ladder.
This accident could have been as simple as that. Maybe that is why the other two went for help?
When I was young we used to go swinging on a rope tied to a tree above a river. Nobody ever mentioned not being able to swim and I am sure my parents never knew.
Only difference being we cycled there.