think our current culture tends to push people into a certainty that they may not be inclined to, thus over-representing both atheists and some-sort-of-deists.

I get the opposite impression, that our current culture pushes people to express uncertainty instead of certainty, and especially if they are leaning towards atheism. That's why "agnostic" is much more societally acceptable than "atheist". If one says "I doubt there's a God" or "I don't know if there's a God" that signals humility. If you say "There is no God" that's seen as arrogance.

but there's no evidence that "Let There Be Light" wasn't what God said right as he initiated the Big Bang

Are we talking about this supposed being called 'God' producing acoustic vibrations in the pre-expanded matter of the early universe that corresponded to those English words in particular? Or was God speaking Hebrew?

If we did manage to detect that far back into the early conditions of the universe, and we figured that there's no such acoustic vibrations corresponding to human words anywhere in the early matter of the universe -- would that satisfy you as evidence against?