Much like rules and laws, traditions and customs are used to control in The Giver. They often disguise the reality of a situation; ritual chanting hides the pain of death. Ritual tellings give meaning to lives that have been lived without individuality or choice. Perhaps more dangerous to freedom than strict laws, traditions control people emotionally, not just behaviorally, in this novel.
Traditions threaten the freedom to choose more than rules do in The Giver.