Once upon a time it was a contentious idea that humans had significant authorship in photographs, which merely mechanically captured the world. What % is the camera's independent inspiration?
Here, we have humans guiding what's often a quite involved process of synthesis of past human (and machine) creation.
The person using the AI doesn't matter in the equation. They aren't an artist, they're a monkey with a typewriter.
We're talking about the AI here, because it can generate the same images no matter which monkey with a typewriter is typing the prompts.
That's an opinion.
Does your opinion hold in all circumstances? If I spend 20 hours with an AI, iterating prompts, erasing portions of output and asking it to repaint and blend, and combining scenes-- did I do anything creative?
No matter how great the AI is, a monkey with an AI will never generate anything useful.
We do know one thing for sure - that for AI it’s 0%