They aren't arguing against technology, they're saying that a person didn't really make anything. With photoshop, those are tools that can aid in art. With AI, there isn't any creative process beyond thinking up a concept and having it appear. We don't call people who commission art artists, because they asked someone else to use their creativity to realise an idea. Even there, the artist still put in creative effort into the composition, the elements, the things you study in art appreciation classes. Art isn't just aesthetically pleasing things, it has meaning and effort put into it