How many people here think their immediate parents are not as technologically capable as them? Grandparents less so? Great-grandparents?
You don't think less of them though, do you? You wouldn't go on telling tales to your kids about how ignorant your grandparents were and how much superior you are know, would you?
Human speech developed the same way. It probably took hundreds, if not thousands of generations. One person looking back would not see such a disparity of capabilities to make stories about it.
So, each succeeding generation got more and more 'smart'. Not suddenly, but so gradually no one noticed. Why would stories be told of this?
Religion's creation tales only came about millenia later, when groups of men started looking for way to control other men. Enter an all-powerful god or gods to whom only a select few can talk to.
A fanatic is one who, upon losing sight of his goals, redoubles his efforts.
--George Santayana