There's all sorts of things the image generator can't do that a human artist can:
eg. Try making a series of images for a book using the same character but doing different things.
PS: Would you trust an AI to generate a complex PCB?
I don't think the AI image generator, is even being artistic at all. It is relying on the user of the AI package, to choose an image, because it looks the way they want. I.e. all the artistic taste, comes from the human user of it, NOT the AI system.
Hence the need for it to give, four sample images each time, in the hope that at least one of them, might hit the mark.
I'm not even convinced, a system which only uses relatively short text descriptions, is going to get the right/desired image. Especially with very tricky things. Whereas a real artist, would probably (I guess) spend time with the customer, and do very quick rough sketches, get feedback on those, to narrow down what the customer really wants.
Maybe it is a bit artistic, especially with the oil paintings. But I've seen too little and know too little about it, to know, either way. I remember the old/previous one (or something), could make these sickening (at times), pictures of cats, which looked rather horrifying. There still seems to be a bit of that left, in the system.
Because although humans, look ok, at a quick glance, a more careful look, especially around the eyes area of the face. Doesn't look right, and even looks a bit spooky, in a bad way.
E.g. Posted earlier in this thread. It looks a bit odd/funny, if you look at it carefully. Especially the face, and the eyes. It doesn't look right or good, to me, at least.