1. You as in you believe in a god
2. Our forebears followed the best path they knew of, I don't fault them for that.
"And of course, you can always counter with, "Who/what created God?""
Nope, I'd counter with "Why did someone need to create the universe? Even if the ultimate answer is "we don't know" the lack of evidence of something does not give evidence of something else.
This is a reasonable answer for a materialist approach to philosophy. The more argumentative atheists seem to have a presumption that "we may not know now, but all the religions must be wrong. And science will someday give us the answer." The latter parts seemingly irrational in my not-as-humble-as-it-probably-should-be view.
A good theological approach seems the most rationale. The idea is that we can't know everything on our own, but we can know what God chooses to reveal to us. The trick here is either to know the voice of God apart from your own, or to find evidence of who might be legitimately prophesying on behalf of God. Of coarse, many religious folks are not particularly good at either one. But on the evidence the atheists are even worse (being convinced that God isn't even real, and usually even maintain the absurd presumption that they themselves don't have a spirit or soul).
The lack of evidence? You mean there's no evidence that the universe exists? ;^)
The fact that everything is here is evidence that it came from somewhere and/or from something. There is an Original Cause, and whatever/whomever it is, I'm grateful.