Who knows? But why not give the same skepticism to the idea of "there is no God"? All science is a building of knowledge begetting knowledge; and yet we discard the most basic idea of cause and effect.
Which is why I ask - where have you seen something come from nothing? And yet without skepticism, you think it's possible - the causeless effect - matter appearing - governed by laws that came from ...nowhere??
Parallel universes, endless expansion and contraction; all of these are greeted with a "hhmmm... that's an interesting hypothesis, it's possible...yes I like the idea." And this without a single shred or inkling of possibility.
And yet, bring up the idea of a creative mind? Oh, the skepticism - "that's impossible - you're a fool for accepting the idea of a fairy tale."
Everything in our experience points to effects having a cause. Why don't we extrapolate that out when it comes to origins?
Who knows? But why not give the same skepticism to the idea of "there is no God"?
Back up one step and ask, "Where did the universe come from?" Insert your answer, "Who knows?"
You're adding a step that's not needed.