It's that it's like watching how someone might treat a slave when they think they're alone. And how you might talk down to or up to something that looks like another person. And how pathetic you might act when it's not doing what you want. And what level of questions you outsource to an LLM. And what things you refuse to do yourself. And how petty the tasks might be, like workshopping a stupid twitter comment before you post it. And how you copied that long text from your distraught girlfriend and asked it for some response ideas. etc. etc. etc.
At the very least, I'd wager that it reveals that bit of true helpless patheticness inherent in all of us that we try so hard to hide.
Show me your LLM chat history and I will learn a lot about your personality. Nothing else compares.