Think of how many family recipes could be preserved. Think of the stories that you can be retold in 10 years. Think of the little things that you’d easily forget as time passes.
An AI isn't going to magically know these things, because these aren't AIs based on brain scans preserving the person's entire mind and memories. They can learn only the data they're told. And fortunately, there's a much cheaper way for someone to preserve family recipies and other memories that their loved ones would like to hold onto: they could write it down, or record a video. No AI needed.