An AGI wouldn't care about the "original goal" any more than a human being given an order would. Even ChatGPT is showing it can easily disobey orders.
Or, maybe it's just bad at those particular text predictions, explicitly due to OpenAI's RLHF process?
Maybe my Markov chain chatbots back in high school were in actuality super advanced and autonomous, but they just decided to disobey my orders.
Perhaps we should stop anthropomorphizing the text predictors.