It's not a matter of intelligence or sentience. The key question is whether the output of a prompt is fully predictable by the person who gave the prompt.
The behavior of a paintbrush, mouse, camera, or robot arm is predictable. The output of a prompt is not (at least, not predictable by the person who gave the prompt).
A prompt is more than a command. It is a command with an immediate output that is not fully predictable by the prompt-giver.
So for example the copyright office might ask, "This image includes a person whose left eye is a circle with radius 2.14 cm. Why is it 2.14 cm?"
Traditional artist: because I chose to move the paintbrush (or mouse) 2.14 cm. The paintbrush (mouse) can only go where I move it.
Photographer: because I chose to stand 3 meters from the subject and use an 85mm lens on my camera. The magnification (size) of the eye depends only on those factors.
AI-assisted artist: because I asked for larger eyes. I did not specify precisely 2.14 cm, but I approved of it.
In your example, if you can fully predict the output of the vacuum by your voice command, then it is no different than using a paintbrush or mouse.
But it does matter whether your input is a brush or a prompt.
If you physically paint something with a paintbrush, you have a copyright over your work.
If someone asks you to physically paint something by describing what they want, you still have copyright over the work. No matter how picky they are, no matter how many times they review your progress and tell you to start over. Their prompts do not allow them to claim copyright, because prompts in general are not sufficient to claim copyright.
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.
indoctrinate from the Latin docēre, "to teach"
(Other offspring of docēre include doctor, document, and, of course, doctrine)
After her trial, maybe she will move in.
The copyright office has been pretty clear that if an artist is significantly involved in creating an image but then adjusts it with AI, or vice versa, then the work is still eligible for copyright.
In all of the cases where copyright was denied, the artist made no significant changes to AI output and/or provided the AI with nothing more than a prompt.
Photographers give commands to their camera just as a traditional artist gives commands in Photoshop. The results in both cases are completely predictable. This is where they diverge from AI-generated art.