> they absolutely have the capacity and information necessary to train the chatbot to advise their own clients.

That doesn't follow. In fact, having this capacity and information creates a moral dilemma, as giving customers objectively correct advice is, especially in highly competitive markets, bad for business. Ignorance is bliss for businesses, because this lets them bullshit people through marketing with less guilt, and if there's one thing any business knows, is that marketing has better ROI than product/service quality anyway.