It’s not that she didn’t do (a lot) of work, but that the creation of the underlying work happened by AI. If it were human then it would hold the copyright, but it’s not so it doesn’t. The logical misstep is thinking, “because it can’t have copyright, someone else can.”
I think prompting the AI is like taking a photo in that you set the parameters and subject and press the button to get an image
The issue is that the AI's output is deterministic, and the prompts it uses are commonly too short to be eligible for copyright, not least because someone else could plausibly use the same prompt independently. With the same seed, the AI would then produce the same image. Or produce a similar image in response to a similar prompt.
If you could copyright that, you then have an enforcement problem, because the usual way to show copying is similarity, but you can then have two images that are similar yet independent. And some light Photoshop work is not going to eliminate the similarity.
Yes, there is a deterministic component (although, to my knowledge, the AI tools aren't actually deterministic over their parameters). But the resulting work involves a lot of human creativity and intervention.
At the end of the day, generative AI, Stenograph, and this painting device are all tools.
If you shake a kaleidoscope and then take a picture through the lens, I'm pretty sure you have copyright on that photograph, even though someone else made the kaleidoscope
Point a digital camera at a still scene under controlled lighting conditions and it's pretty deterministic also.
Anyway, it's easy enough to add randomness to the AI image generation process (and Midjourney does do that by default, as a matter of face), so the process need not be deterministic at all.
And it's not randomness that fixes it. Do you even want to get into the information theory problems if you could copyright the output of a random number generator?
What you need is for someone to be making creative choices with enough entropy to be considered original and not be reproducible by feeding a short sentence to an existing algorithm.
Same as how when you freelance, the customer (usually) owns the code you write for them.