I thought the same too! I thought it was so unwise to walk with her headphones on, in the pitch dark talking to the camera. She seems to walk at the same time each morning and is paying so much attention to her phone, she wouldn't be aware of who is around her. It would be easy for someone to figure out her schedule. What a scary thing to happen to her though.
Actually it seems she didn't learn, as this morning she was walking in the dark talking to the camera with her airpods in. I know people say they can't let things like that get to them, but it doesn't hurt to be cautious.