It can be incredibly hard to get a person to acknowledge that they might be remotely wrong on a topic they really care about.
Or, for some people, the thought that they might be wrong about anything attall is just like blasphemy to them.
"Acknowledging they might be wrong" makes them sound like more than token predictors trained on polite sounding text.
When you don't do that sufficiently you run the risk of producing the "Sydney" personality that Bing Chat had, which would argue back, and could go totally feral defending its incorrect beliefs about the world, to the point of insulting and belittling the user.