On the cutting edge: I've seen techies using ChatGPT to make up and read bedtime stories to toddlers, or to tutor them during the day, so that the parent can stay focused on their career. I don't know that it's harmful, but it seems messed up. I wonder if a kid raised this way will end up tripping LLM text detectors for life...

The lower-tech equivalent of this is a toddler being raised by a tablet or a smartphone. Not necessarily because the content is harmful, but because it's neglect - just like leaving a kid in front of a TV back in my day.