Alright, first of all, good to see you're still alive and kicking.
Second. You can't define art. I can't define art. Wikipedia can't define art. Art scholars can't even define art. So let's agree that we won't be discussing what art is here.
Now that we have that out of the way, I'll go ahead and define art.
I suppose I agree with you for the most part. There are three legs of art that hold it up, like legs of a stool (as in a backless chair, not poo). There's the artist, who creates the art. Most practitioners of magic have this part down. The fact that the magic is happening pretty much ensures that there's someone creating it. Next, there's the art itself. The magic. Again, without it, we'd not be getting anywhere. Finally, and this is the part that is most commonly overlooked, is the audience. As an artist there is a point at which one must part with his or her art--that is, give it up to your audience to interpret as they will. That's where most people fail.
To be an artist, there has to be that offering of the art to an audience--to someone or someones who will receive it. That's where most hobbyist fail. They keep it to themselves. If a tree falls in a forest and nobody is around to hear it, why should anyone care?
Hope all is well, and happy new year.