User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-73.212.71.148-20150928163607/@comment-24834479-20150928234523

God doesn't like to destroy his children, so he locks them away instead, so they can't harm others. Either God didn't want to change the beats as they were (free will maybe), or the darkness infected them with their hunger, and he couldn't remove it.