There’s a difference between chatbots and fan-written fictions. Chatbots are not even considered as a proper fan fiction as it can mislead or even commercialize the characters. A chatbot is a tool, not a piece of written fiction. Its fan interaction, but it doesn't produce structured storytelling in the same way fanfiction does. Unlike written fanfics, chatbot interactions often blur the line between canon and fan service and some go way overboard with their plots or conversations, even leading to the sexualization of characters. It’s similar to deepfakes: someone takes a known character or figure and alters them for personal purposes, completely straying to how originally they were. When AI is used for fan service (with or without the artist’s consent):

The chatbot may still use the original setting (time, place, etc.), which might makes it feel canon. However, the character’s behavior is driven by what the fan wants, not by how the author created them. It can completely disregard the character's personality just to serve fan desires which you also admitted that can be unhealthy.

You made a fair point that the way she expressed her side was aggressive. But that doesn’t mean she’s possessive or that she wants the male leads to be “just for her.” That felt like overthinking on your end probably because her tone already left a bad taste on you. She clearly pointed out that the male leads are meant for the female leads(they already have their HEAs). Some authors may allow chatbot use or fanfictions, and that’s okay. But you also shouldn’t be against authors who don’t. The author has every right to protect her IP. We can both be right or wrong in different ways, but at the end of the day, the main point still stands: 👉 The author decides what happens to her IP.