Humans ar not born with innocence but have to learn it. How could someone just be innocent by being born, unless it's magic. People would have to learn to be innocent using rules and just common sense...
We humans need rules in order to survive or do task. For example when adults drive they need to follow the rules in driving. For us to survive we eat, so we go to the grocery store to buy food and pay for it. If you don't pay then you're breaking the law. So humans do need rules and structures, because no one is Born innocent