I see your point about security, but I think that you’re taking a first-world concept into a third-world scenario, so the value of security is greatly diminished.
If he’s living in a third world country, chances are there is far more community in his village than we see in suburbs of the US. I’d wager that there is a good deal of looking out for one another in that situation. We in the US have enough wealth that we can afford, monetarily and resource-wise, to live in a fashion such that we can be self sufficient. So the only thing to think about is if the child gets really, really sick - any other sickness (cold, whatever) is just as much an inconvenience to the fisherman as it is to a couple of parents in a first-world situation.
So going with the idea that the child gets really, really sick (cancer, needs an organ transplant, etc) - how is that different than here? There are many cases where the medical bills far exceed the income of a couple who have ‘security’, and they end up in massive debt to care for their sick child.
And if the fisherman loses his boat due to hurricane, chances are it wasn’t a $25k boat that the fisherman will never be able to replace. It’d probably be more like a skiff or something with lashed together logs.
My point is that security is relative. Security is a concept that means to protect against loss. The less you have, the less you need security. First world parents need security because they live in a world where tangible resources like money and assetts are a necessity in the first world economy. Third world parents have little use for first world economy assetts - it’s a completely different paradigm.
But I digress - the moral of the story remains the same. There are those who will run the race to get to the flowers at the end of the road, and there are those who will smell the flowers as they come along. Neither is right, and neither is wrong. Depends on the person.