If someone studies Van Gogh and reproduces images, they’re still not making Van Gogh - they’re making their art inspired by Van Gogh. It still has their quirks and qualms and history behind the brush making it unique. If a computer studies Van Gogh and reproduces those images, it’s reproducing Van Gogh. It has no quirks or qualms or history. It’s just making Van Gogh as if Van Gogh was making Van Gogh.