No, there is nothing wrong with calling them naturally ignorant.<quoted text>
It is hard to call a culture naturally ignorant because they did not know the knowledge that did not exist.
I am sure there are many things that we are naturally ignorant about due to knowledge that we have not learned yet.
I of course not say what we are naturally ignorant about since, as you pointed out, that knowledge does not exist yet.
My point was that there is a big difference between be naturally ignorant, where the knowledge does not exist in the world yet, to being purposefully ignorant, which is what almost every creationist is.