The argument relies a lot on an analogy to photographers, which misunderstands the nature of photography. A photographer does not give their camera prompts and then evaluate the output.
A better analogy would be giving your camera to a passerby and asking them to take your photo, with prompts about what you want in the background, lighting, etc. No matter how detailed your instructions, you won't have a copyright on the photo.
The argument relies a lot on an analogy to photographers, which misunderstands the nature of photography. A photographer does not give their camera prompts and then evaluate the output.
A better analogy would be giving your camera to a passerby and asking them to take your photo, with prompts about what you want in the background, lighting, etc. No matter how detailed your instructions, you won't have a copyright on the photo.