It's a good thing that the ancient Jewish mythologies never attempted to explain gravity. Imagine what a mess that would be with Fundamentalists attacking Newton's theories and then Einstein's General Relativity. Of course, they would debunk "Newtonism" as a strawman, and then claim that it proves the Theory of General Relativity false.
Interestingly enough, the theories on the origin of the Universe attempt to explain how and when gravity came into being along with the other fundamental forces currently recognized by science. Just because scientists have yet to explain exactly how the Universe came into being, or even create new Universes in the laboratory, does not mean that Quantum Physics and General Relativity are false. Likewise, Evolution is not false simply because the origin of the first life on this planet still remains a mystery, at least until someone can build a time machine to travel back 3 billion years and observe the event in progress.
If someone want's to believe that his or her invisible friend in the sky made the Universe and then made the living things on this planet, that is his or her prerogative. Just don't assume everyone else believes in invisible friends who magically make things. "God," "Holy Spirit," and other kinds of "magic" are not explanations. They are "thought stoppers." To marvel at complexity is human. To make extraordinary claims about invisible beings is fiction. Or maybe theology. But it's definitely not science.
If you find it hard to believe that the first life form "came about by chance," keep in mind that I find it hard to believe that a talking snake convinced a naked woman to eat a piece of fruit from a tree in a garden planted by an invisible superbeing who then couldn't find the woman or her husband because they hid when they realized they were naked.