@squidcake
There is much lost on the web view of the Pollock’s Number 5.”
The machine you envision has in effect already been invented. I do custom Giclee artwork reproductions to actual size on 54” printers. By spraying, they are in effect “throwing” pigment on canvas. And yes, I run real canvas through the machines and finish it with the whole stretch bar routine. The pigment is the same as the actual oil paint and has an archival rating of 400 years or more.
What we miss is the dimensional layering of the real Pollock Number 5. I’ve not seen any computer or printer accomplish that. There is a depth that can only be appreciated by standing in front of the real deal. And this speaks of the “soul” that @Captain_Fantasy mentioned earlier. That is actually the specific reason behind why you suggest we might claim “Oh, well, it’s not human enough. There’s no feeling. Screw that.” And you are right to do so.
However, this is the method that humans create machines to make duplications.
If a real A.I. ever arose, then it would not be making duplications. It must have the capacity to create. Otherwise it is not a genuine A.I.. That’s the qualifier as far as I’m concerned. Just as God supposedly created Man in his own image, that image being one of Artistic Creative Ability (what separates us from animals), then so too must the A.I. be created in the image of Man, and therefor have the same faculties to express and create artistically… and with soul.