Matthew 2:13 When they had gone, an angel of the Lord appeared to Joseph in a dream. “Get up,” he said, “take the child and his mother and escape to Egypt. Stay there until I tell you, for Herod is going to search for the child to kill him.”
How were they in Egypt to start with? God sent them there to make sure Jesus the child was safe until Herod was no longer there to try and hunt Him down.
Mary and Joseph were given the task of looking after Jesus as a baby and bringing Him up, making sure they all followed God’s instructions as a family.
Being a family in Christ is always going to be more resilient than a single person in Christ.