Paired with an LLM which regardless will generally be ~80% agreeable with you, the conversation will literally be unending. After each point there will be a rebuttal of doom and very little reason involved on the human side in the middle. Unable to be convinced of anything and paraphrasing LLMs all along the way, the conversation is pointless.
If I wanted an endless disagreement with an LLM I could set that up in my own time, I don't have to do it in public. Or I could find a friendly toddler in their "Why?" phase.
If you'd like we can prime a couple of LLMs with our opinions and watch them go back and forth without us.