Well it seems I am being educated here, going through the chaff and wheat and what would deem worth pondering I have come to put my position at about the pantheist approach to whether or not a "god" exists..... still agnostic I think..... complete Atheist not yet.....
I would have to admit that I find it difficult to imagine a Universe coming from nothing etc etc.....
As far as I'm aware, no scientist is claiming it came from nothing at this point.
However, we're still left with the question of where it came from even if it came from something, and if it did where that something came from.
Causality may not be the best way to think about it, especially in light of quantum mechanics and curved dimensions.
Point of interest: the big bang theory was derided as theist crap at the beginning exactly because it seemed to confirm what creationists had been saying all along - that the universe had not existed forever.
Of course, I don't see how a universe having existed forever is any more or less dumbfounding than one that came into being.
It seems to me that the odds are just too great for it all to happen just by coincidence....
There's a third way beyond accidant and purpose. Evolution illustrates it quite nicely. How probable is it that your exact genetic code would exist in you, at this time, at this point in space? Utterly negligible. However, it is highly probable that something would exist. Maybe not human life, maybe not even life, and maybe not even matter. But something. Something similar has been suggested for the natural laws.
In terms of a cosmic perspective, you're insignificant. You only attribute significance to yourself because you're here and thinking yourself important is an evolutionary trait (same for me, of course). There's a great many interactions just as complex as you are going on without the benefit of sentience.
We simply don't have enough information to judge yet whether it has all been an accident or if universes naturally bear life. Life may be hypothetically available in many forms, even just in our universe.
The big bang may have been just a result from a big crunch, meaning there'd have been a string of universes "before" ours, making an eventual appearance of something capable of asking "why" a certainty.
And, that leads us back to the first question ...