Why would I want AI to write diary entries for me? Maybe the other stuff is valuable, but this seems like an inversion. I would prefer it help me write an entry by giving me a useful view and context with extremely low friction entry. Maybe I'd want nudges and reminders or reframings based on my entries, pending privacy concerns, but I definitely don't want a diary not written by me. The writing itself is the value, the act of thinking, preserving your feelings and thoughts honestly.