The short answer to the question - No.
The questions presents a false dichotomy - "Religion" as it is or "Religion never existing."
Further, the argument against religion ever existing presents us with the scenario of Abrahamic religions (i.e. Judaism, Christianity, Islam) or no religion.
I agree, due to Abrahamic religion not evolving with human thinking, the world and the state of Abrahamic religion is in a horrible state. There are those who are trying to change that and there is evidence that in the not too distant future (maybe even in our lifetime) we may see that (see Ken Wilber's works on Integral Theory).
I agree that religion is not required to teach children morality. My own children were spared being raised as Jehovah's Witnesses. In spite of zero religious indoctrination or suggestion by my wife and I, our children have been drawn to spiritual practice (my youngest asked me to buy him the Tao Te Ching). I think the best purpose for a spiritual practice is to show gratitude for life and to help those who want to learn how to be happy.
Integral thinking can be seen practicing Jews, Christians, Muslims, and Hindus (I will throw Buddhists in there, too, but Buddhism really isn't a religion or at least isn't concerned with whether there is or is not a god or how we came into being). An example is a guy I stumbled across named Wescott Louden. Wescott was raised an evangelical Christian, became an atheist, then practiced Buddhism only to finally to convert to Catholicism. If you were to ask Wescott is Christianity and Jesus the only way to be saved and the only true religion he would answer "Saved from what?" and "No!"
Finally, the idea that have one life - we did not exist, we were born, we lived, we die and then cease to exist is an idea. An idea that some would call an illusion. As is our memory and illusion and our ego. Our true self lives in the eternal now and, as my buddy Wescott would say, Heaven - your standing on it.
