There's an assumption in many of these cultures that these children are mentally retarded, when in fact they're not at all. I saw how the operation affects the child, as well as the child's family and often the village. ↗
But if we can manage it so people don't have things forced on them that they don't want, I think there's every reason to believe things can settle out in a situation that is recognizably better than the one we're stuck in today. ↗
The other advantage is that in conventional manufacturing processes, it takes a long time for a factory to produce an amount of product equal to its own weight. With molecular machines, the time required would be something more like a minute. ↗