A bit late here, but...
You are ignoring a lot of evidence. SJ stating they asked for permission twice. One of which was requested days before they released it. The Her tweet would seem to corroborate it's meant to sound like her. They then take it down (presumably since they aren't confident they'd win and don't want to be subjected to discovery.) Because of their tweet, even if the voice actors normal voice was identical to SJ, it's pretty clear they were trying to profit off her voice.