I was about to to comment the same, I don't know if I believe this system prompt. It's something that ChatGPT specifically seems to explicitly be instructed to do, since most of my query responses seem to end with "If you want, I can generate a diagram about this" or "would you like to walk through a code example".

Unless they have a whole seperate model run that does only this at the end every time, so they don't want the main response to do it?