How to evaluate the creativity of new use patents of products?

As a kind of method patent, product use patent is common in drug and chemical composition use invention, but not common in structural invention. Although the principles and standards of creative judgment are the same, personally, it is more difficult for the latter to meet the creative standards, because the technological enlightenment or easy thinking of the two types of products are different in the conversion process. Therefore, I personally think that the possibility of patent authorization is low under the circumstances mentioned by the subject.