I recently went to a small conference focused on AI art. What you said is simply not true for the best AI "infused" works. Many AI art creators use tools that allow you to combine different inputs, including their own "handmade" art, which are later processed by a pipeline that also include AI and require manual selection of intermediate results. There's a lot of manual work and artistic expression involved, and the average person wouldn't be able to replicate the results through a simple prompt.
While it is true that most people enter a low-effort prompt and call the output "art", better artists are going well beyond that. This is why I think it's just a more powerful version of "standard CGI" (image processing and 3D rendering).