I'm sure whoever pitched this 'dedicated' feature in Cupertino had to make sure to state that customers would purchase a new iPhone for this role rather than... shudder reuse an old device. As we all know, Apple has a deep and abiding desire that the vast majority of used iPhones be shredded[1].
[1] https://www.ifixit.com/News/94386/the-truth-about-apples-fre...