Shouldn't the voice be personal identifiable information? Just as a picture is. They could of course store a machine translated transcript instead (assuming no

Shouldn't the voice be personal identifiable information? Just as a picture is. They could of course store a machine translated transcript instead (assuming no personally identifiable information is uttered (though almost always there is, the customer is expected to give a customer ID or something)). Also, considering how bad computers are at understanding spoken words the usefulness would be debatable depending on context.