In The Giver families there is no real love. If there is no love there will not be heartbreak. Heartbreak can lead to stress, and in some cases can lead to death. Yes, it can happen to humans, not just guinea pigs. Heartbreak can also lead to depression. Depression can make people do worse in school. People can stop caring about anything else. It can also lead to suicide.
Since there is no love in The Giver families will not separate like they do in real life. Divorce isn't just hard on the parents, but the children too. The children sometimes have to suffer