Again right on target. But also right into the blind spot of the Calvinists. Of most "Bible only" Christians, in fact.
When the written Word of God is held as the only valid means of God interfacing with us, it is only natural (get it?) that the tale God tells in Creation is not understood. Cultures who do not have direct revelation like we have, can only see by the lights they were given.
And yes, they do have some light!
SD
So what does the word of God say about the "light" they have?
Jhn 1:4 In him was life; and the life was the light of men.
Jhn 1:5 And the light shineth in darkness; and the darkness comprehended it not.
Jhn 3:19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.