The point is NO ONE knows the answers and what are the chances that the enormous complexity of our planet and all the billions of forms of life on it have just evolved from 'The Big Bang', because a few scientists cannot think of what else could have started the universe; is no reason to believe them either.
The same as many people followed religion blindly in the past, does not mean we now have to blindly think science is 100% right today, 'Big Bang' my arse!