The ones that don't die or get permanently maimed in an accident live long and healthy lives, you mean. Which is still a very large majority, sure, but dying from a road accident is still a way more common way to die in those countries (7-15 times more likely than where I live), and it's a sudden death that can happen to anyone of any age. A kid needlessly dying because his parent irresponsibly carried her on their lap is such a waste of a life.