Good comparison. An AI companion will never talk back or tell you that you're wrong. Kind of similar in my mind to how fast food restaurants won't serve you anything that's too "hard to swallow".
AI can already do that if you're not using a super sanitized model. I've even seen an AI rickroll someone after a line containing similar words came up.
Abilities like that are less of a problem than getting the AI correctly recognize what topics & parts of a text are important and keeping that context for a while.