Yes, generalization is creativity. I don't think there's a difference between the two concepts. Humans don't come up with ideas out of nowhere. Open a novel

Yes, generalization is creativity. I don't think there's a difference between the two concepts. Humans don't come up with ideas out of nowhere. Open a novel and you will find that even though the overall work is unique, it is composed of tropes from other literature and experiences from the author's life which have been generalized into another context.