I imagine there are a few reasons. An LLM is a narcissist's dream--it will remain focused on you and tell you what you want to hear (and is always willing to be corrected).

In addition, LLMs are easy to manipulate, and sort of mimic a person enough to give you a sense of power or authority. So if you're the type of person who gets something from that, there's likely a draw to that kind of person.

Those are just guesses, though. I don't use LLMs myself, so I don't really know.