I agree, this is in the category of "if things were different, they'd be different". All of these things had to be some way, and in every way they could be the

I agree, this is in the category of "if things were different, they'd be different". All of these things had to be some way, and in every way they could be there would be something different now. However, they were they way they were so we're here now. It's a lot like saying that it took a string of nearly impossible coincidences at just the right time for you to be born. Which is true. But just because dad plowed mom at half past two instead of quarter past doesn't mean we don't have a person, we just have a slightly different person. And that person would also be the result of a bunch or impossible coincidences. It's basically the lottery paradox. Every individual ticket is unlikely to win, however, it is guaranteed someone will win.