Let's also remember that there was no preprogrammed plan to make humans during the evolutionary history of life on earth. The evolution of humans is like a single person winning the lottery; it is very unlikely that humans would have evolved (and if Gould is right, it is very unlikely that anything remotely like humans would have evolved), but
something was going to evolve, and humans are one of the lucky species.
So the analogy suffers from the additional fallacy of specifying a particular result (a 747) from the start.
Q: If science doesn't know where this comes from, then couldn't it be God's doing?
A: The only difference between that kind of thinking and the stereotype of the savage who thinks the Great White Hunter is a God because he doesn't know how the hunter's cigarette lighter works is that the savage has an excuse for his ignorance. --
jhuger