The preconditions were ALWAYS going to be perfect. You know the chances of them being perfect? 100%.
You are dealt a hand of 5 cards in poker. The probability of getting any hand at all is 1. The probability of getting one hand is equally probable as the other. But since there are certain winning hands, these specific hand become more improbable.
Because not only would you be calculating any probability but you would be calculating probabilities given other conditions such as in the case of a royal flush, the cards must be same suited and must follow in consecutive order and must be from A to 10.
Now, substitute this premise in cosmology. The probabilty of getting any type of universe is equally probable but the probability of getting a life permitting universe(Royal Flush) without intelligent design is largely improbable.
