The angle of why they would want to protect the voice actor's privacy? My guess is that their fear is people becoming attached to the voice in a sort of parasocial relationship, then seeking out the original voice actor to try and turn that parasocial relationship into something more.
If I were a voice actor, I wouldn't risk sharing my name because 95% of VAs and creators in general would hate me. It's like declaring "I'm using AI to enhance my art" on Twitter, but worse.
Not sure the angle there though? If I was the voice actor I'd love for them to share my name, maybe lead to other gigs.