This thread promised to be interesting, but it's gone down the pan to the realm of nit-picking, angel-counting, semantic dead-ends.
My vote for daftest answer is Togo at 19:53
"No it (i.e. atheism) isn't. It is desire to believe in anything but religion ... with even less proof."
Going back to the OP, whether the 'happy accident' was here on Earth or elsewhere in the universe, it in no way affects anything that Dawkins has written. Khandro, why do you dislike Dawkins so much? I'm sure he doesn't dislike you.