AI generates its are by interpolating what other artists have done, so it depends on the creativity of other artists. A good society would reward artists that contribute to society's creativity output, and not reward the artists that just plagiarize other artists. I would argue AI generated art just adds noise to the system, because it plagiarizes in a difficult to detect way. With humans combining multiple pieces is not plagiarism, because when they do this they will inevitably put their own creative spin on it, but AI purely interpolates.