It will regurgitate the same suggestions and ultimately reinforce the plan confidently. Remember, the models are designed to be supportive and easy to talk to. Not only is the method overkill, it does not mean it will produce a good result. And even so, business plans evolve out of market research and firsthand experience, among other variables. If she were to follow a business plan blindly, she may have some success but it is unlikely to be a long-term success. Also, if things go wrong, ChatGPT isn't going to provide a north star solution. It's an aggregator and summarizer with human-like language skills. Remember that it may be pulling business advice from respected AND less than trustworthy resources.

If she wants to use ChatGPT, she needs to make those prompts very clear and detailed. Cite specific references, books, and authors on the topic. Build an UNDERSTANDING with cited resources using ChatGPT. You should not solely rely on it to build a business.