That's probably ComfyUI, one of the more popular open source tools. You are right, it is visual programming. Mixing text, reference images, and a lot of other items into models to output images. I can easily see someone spending hours to get a single image out of it, but then it becomes a bit of a reusable pipeline. It's a cool tool, and, if as someone else in this comment chain said that art is a study of choice, then the output is arguably art. I'm not sure I'd go that far with it, but I have a hard time calling my programming art as well, although it meets most of the definitions of it, and is certainly a creative act.