Especially if the rest of the audio is nothing but the sounds of terror. That would probably not be helpful to the people in BG's life and it certainly wouldn't be helpful for strangers like us.
Agreed, family(i believe grandfather) said in early interview that they were making videos asking each other questions and chatting about "typical girl stuff" Would be very hard if it were my child to hear her voice over and over again. Then see on sites like this where someone would most likely pick apart what there are saying and link it to some sort of under ground drug ring or worse.