I agree that it's not useful if we're looking at practical stuff. It doesn't matter to me if my table was built with ten hours of human work, or ten seconds.

But for creative work? I think it matters a lot. You used the phrase "creating art." I don't think it counts as "creating" if there's no work going into it. Typing some words into a prompt box and getting a video out is not "creating," any more than doing an image search and printing out an image of a painting is creating a painting.

Printers are extremely useful devices, but they don't create art.