Yea, try talking to chatgpt about things that you really know in detail about. It will fail to show you the hidden, niche things (unless you mention them yourself), it will make lots of stuff up that you would not pick up on otherwise (and once you point it out, the bloody thing will "I knew that" you, sometimes even if you are wrong) and it is very shallow in its details. Sometimes, it just repeats your question back to you as a well-written essay. And that's fine...it is still a miracle that it is able to be as reliable and entertaining as some random bullshitter you talk to in a bar, it's good for brainstorming too.