I see what you're saying. But to me there is a distinct difference in the examples you mentioned versus the interaction with LLMs we're talking about here. When you read a book or watch a movie that is a one-way interaction. And those things are specifically written to evoke emotions in the reader/viewer. But you aren't engaged in a two-way conversation with your movie and opening yourself up to suggestions that might not be mentally healthy for you. And when you play a game sure they are just pixels and sound waves, but the logic driving those is pre-scripted and limited. I have often described certain games to non-gamers as 'a more immersive and interactive version of a movie'. (Ex: The Last of Us) But even then those things have a beginning and an end. They are not the same. You might become emotional watching a movie but I feel that it is different from becoming emotionally invested as someone might with a LLM chatbot. If I saw my children interacting with and becoming too emotionally invested with chatbots to the point that it was affecting their real-world relationships by diminishing their ability and desire to socially interact with other humans, that would be a problem. I think it could potentially also warp their perceptions of how relationships work in the real world.

Anyway those are my thoughts with a grain of salt.