Let's see if I understand what you're saying here, since you seem to be on an entirely different topic. In your opening, you say that the verse doesn't support my statement. It does. True, it is translated "vain", not "void"(I tend to use the Recovery version more than others - the translation is updated to be more accurate and understandable). God created the Earth neither vain nor void. He made it for a reason. Next. You're suggesting that the "he" might not refer to God, and in fact might possibly refer to another god. You're saying this based on the difference in translations, both/all of which *can be taken to mean the same thing*, but can also be taken to mean a different thing, and therefore you argue that it's... what? A coincidence that they can all coincide? They're different translations, all coming out to the same meaning. To argue that they all mean something different is silly or a misunderstanding on my part.
Next, you link that to an assumed fact monotheism didn't exist at the time. Well, before the Old Testament was written, maybe it didn't. I couldn't know. But once the Old Testament comes into existence, clearly monotheism exists, since the OT tells of a monotheism. Therefore, in the OT, that "god figure" referenced (the one who calls Himself "Lord") it's pretty safe to say, is the one God they worship. That's fairly clear, I think...
You mention "Thou shalt have no other gods(lower case 'g')...". Why did He say that? There must have been other gods! You're absolutely right when you think that. There were. For example... Golden calves. Do you see? He wasn't saying "There are other gods, but worship me, not them." Just, "I'm God. Don't try and make any others(mainly because that's silly, but also because God wants man's attention. He has a purpose for men to fulfill, and it grinds to a halt when we look away).
Lastly... science has yet to explain the discharge known as lightning. Also life and death. I think the biggest things science has yet to explain is "What is it about humans that makes them so profoundly aware(conscious)?/Why do we desire more than our livelihood(greed, want - almost completely unrepresented in other lifeforms)?" and "Where/from what did matter originate?". Humans still believe in these figures because we have the innate feeling that there *is* a God, and so we hunt for one.
Now ask me why.