And yet Genesis describes the BBT thousands of years before LeMaitre posited it.Oh, Baloney. Look at Genesis 1:1- 1:3, for Pete's sakes. You have "God created the heaven and the earth" (which is no description of the Big Bang theory; it's no description of anything); the earth being "without form and void", darkness being on the "face of the deep" and God's spirit moving on the fact of the waters; and finally, in the third sentence light is created.
The Big Bang was completely different then this. The most poetic of people cite to Gen. 1:3, "let there be light; and there was light" for your analogy, but the Big Bang was the creation of time and space, matter and energy, not just light. Further, light existed before either the earth or water, neither of which is borne out by Genesis.
As late as Einstein in the 20's non religionists clung to the theory that there was no creation event, the Universe was static.
The Bible is neither a history book nor a science text so as much as you'd like to make the devil in the details the essence of your reply, it fails.
So you can have your baloney and eat it too, I like turkey.