That feels unnecessarily restrictive.

Does Jiro and his sushi constitute an artist and his art? Let's say yes, and let's say most people today agree with this. They're cosmopolitan enough to recognize the sophistication and craft. This definition therefore defines it as "art".

I would say if you told the average Brit living in the UK in the 1950s that there's a guy that's really good at slicing up raw fish, you might get a different average answer.

So I don't think art is dependent on the conclusion viewer, but on the intention of the author. If they arrange rocks just-so, because they enjoy the shadows they make at noon, I think that's art.