The purpose of a family account is to house individual player accounts. Parents with multiple children would find the family account beneficial. For a parent with two or three (or more) children who play soccer, they can create a family account and then import the individual player accounts into the family account. Once the individual player accounts are imported the parent can access the player accounts from within the family account. (Click here to learn how to import player accounts into a family account)
Of note, it is important to remember that the player accounts are separate from the family account. The player accounts will still have individual usernames and passwords.