A person painting a rose bush draws upon far more than just a collection of rose bushes in their memory. There’s nothing vague about it, I just didn’t feel like getting into much detail, as I thought that statement might jog your memory of a common understanding we all have about art. I suppose that was too much to ask.
For starters, refer to my statement “a person understands why a rose bush is beatiful”. I admit that maybe this is vague, but let’s unpack.
Beaty is, of course, in the eye of the beholder. It is a subjective thing, requiring opinion, and AIs cannot hold opinions. I find rose bushes beautiful due to the inherent contrast between the delicate nature of the rose buds, and the almost monstrous nature of the fronds.
So, if I were to draw a rose bush, I would emphasise these aspects, out of my own free will. I might even draw it in a way that resembles a monster. I might even try to tell a story with the drawing, one about a rose bush growing tired of being pkucked, and taking revenge on the humans who dare to steal its buds.