This comes up all the time. One could respond with equal force that thinkers who believed in Zeus did some useful work too, but so what? We don't give credit to the Olympian gods because of the work of Greek philosophers, scientists and mathaticians.
The question is not whether someone was a creationist (prior to the general acceptance of Darwin's theory, virtually everyone was), but whether "creation science" itself has ever accomplished anything. I suggest that it hasn't.
No one is arguing for polytheism. Why is it so difficult for darwinists to conclude, according to the evidence, that there is a Creator in back of the universe.