Your first paragraph is a semantic argument that has no bearing on the author's thesis. It doesn't matter if meaning is inherent to human life or decided upon by the humans themselves, the argument is that AI art models implicitly put forward the notion that creativity is just putting pixels on a screen or words on a page - but actual artistic expression requires more than that. Even if an AI generates a series of words that are indistinguishable from poetry written by a person, that AI has at no point engaged in the activity of "writing poetry".
Your first paragraph is a semantic argument that has no bearing on the author's thesis. It doesn't matter if meaning is inherent to human life or decided upon by the humans themselves, the argument is that AI art models implicitly put forward the notion that creativity is just putting pixels on a screen or words on a page - but actual artistic expression requires more than that. Even if an AI generates a series of words that are indistinguishable from poetry written by a person, that AI has at no point engaged in the activity of "writing poetry".