I won't even critique the rest of the article; there's no need. If AI-generated content is beneficial and helpful to humans, then I think one is hard-pressed to call it garbage, and the underlying thesis fails. And to my knowledge, no one — not even the article's author — denies that AI products can be beneficial.
AI is a tool, just like, say, Photoshop is a tool, or a compiler is a tool. No points are awarded for having human beings do by hand all the tedious work that tools can do better. In the end, creators, whether it be of paintings, or poetry, or essays, or software, will stand on the shoulders of these tools and thereby accomplish things that previous generations could only dream about.