I know they are used for investors but a business plan is mandatory anyway (in my opinion) if you want to increase your chances on success. I agree with you on "when you research, you learn more about what is needed and if it's for you". ChatGPT should be used as a tool because you need to think for yourself. Own due diligence stays important, ChatGPT isn't ready or meant to replace it. People who use AI as a tool, will have an advantage. People who rely on it won't succeed in the long run.