You're told not to touch the candle flame as a child because it'll hurt you. It's a story you've been given by the people upon whom you rely for your survival. So you accept it. Until you forget. Or you doubt. Or you just get too curious to leave it be, and you touch it, anyway. And you get burned. And it hurts.
We're told lots and lots of stories as children by the people we rely on for our survival. And we believe them. Until we forget, or we doubt, or we get curious. Then we'll defy the story's "lesson" and test it for ourselves. It's what we humans do. Some of us will test all of them many times. Others will test only some and only once. Each according to our natures. And then when we have children we will pass the stories that we now hold to be important on to them. And they will accept them blindly as we did. Until they don't.
The point here is that all of us are trying to deny them that story in favor of this story because this story is our story, and that one is not. What you are suggesting in leaving religion out of it is no different than what those who want religion in the story are doing. Everyone is editing their stories and passing them on as they see fit. And then the next generation does the same. It doesn't matter whether religion is part of little Johny's story or not. It's part of the body of stories that we all have available to us and when Johnny forgets, or becomes skeptical, or becomes curious enough, he can seek and test it out. And if he doesn't, it's because he didn't feel a need to. And only Johnny can determine that. Not you, not me, and not even Johnny until it's time.
In the meantime we give them our stories. Because those are what we have to give them.