In Chapter 13 Jonas questions why people in the community cannot make their own choices and The Giver provides one main reason: they might make the wrong ones. As a result, no individual feels the disappointment that comes with making an incorrect choice. Jonas then immediately agrees that this would be a bad thing and even muses about how terrible it might be if members of the community could choose their own jobs and spouses. What Jonas fails to recognize is that the lack of individual freedom of choice also means that no one ever experiences the joys and happiness that can come from choosing something of one's own.
This lack of individual choice implies that the Elders know the citizens better than they know themselves and that individual choice is dangerous.