It's not necessarily the only solution, just the one Apple has started with. My guess is that at least in part there are technical reasons, since even this stru

It's not necessarily the only solution, just the one Apple has started with. My guess is that at least in part there are technical reasons, since even this structured approach will require overnight processing (source: WaPo) by Apple. I do think additionally, in the case for a situation like with your dad, Apple would need to verify that he is the same person that there's hours of audio of. That strikes me as a difficult at Apple's scale.