Lord Botta
Minister (2k+ posts)
What you are asking is the old village atheist question "If God created the universe then who created God?". Its so simple that except for some simpleton atheists , the question has been largely given up. Who created God and then who created his creator and so on would lead one into "infinite regress" and hence there would be no Big Bang and the universe. Per Ocam's Razor , just one omnipotent God is enough to explain the origin of universe and its fine tuning so you don't need to go beyond that.The idea of creating a car and micro chip is not the same as universe. Micro chips and cars are made out of rearranging already existing materials. When we are taking about universe we are talking about matter coming into existence from nothing. They are not the same. Also cars and microchips are man made objects, you have seen humans make those objects same as you have seen bees make honey thats why if we see those in a desert, we know they didn't come out of nothing. But what about rivers, mountains and oceans? (Have you ever witnessed a God make those things or make the universe?)Do you ever wonder when you see a mountain that someone put it there? No because we know they are formed by naturally occurring processes. So we cannot compare artificial objects to natural ones as it will make it a false analogy.
No one is saying that it happened on its own. We know that everything we observed after the big bang has natural explanations and all the matter was rearranged by natural processes to form galaxies and stars. But what happened before big bang we do not know. We just have ideas about what may have happened but we do not know for sure.
Also there is a major flaw in the argument that if something is complex therefore it has a creator as this will create an infinite loop of creators and creations and there is no way out of it without special pleading which is also a fallacy.
As far as , what kinds of things need an explanation for their existence or a creator , everything that possibly (contingent) exists need an explanation for their existence whether as simple as an algae or as complex as the universe. Their are other entities which necessarily exist and hence they don't need an explanation of their existence. Like the numbers , no one made them and they solely exist due to the necessity of their existence. The same goes for God.