Also, if children are only taught the bleakness of atheism, that they are merely soulless and highly evolved animals and/or morality is merely a social construct, of course they will not see themselves as having any inherent value. They are merely a collection of atoms, a random event that appeared in the universe. Absurdly able to ask, "why am I here and what is the meaning of life?" to a dead universe that isn't listening. They have no ultimate purpose, no value, no future. Soon, they will die like all other animals as individuals and eventually as a collective species. And then the universe after us will eventually perish in the great heat death when all light and warmth and life are forever extinguished.
I get depressed just thinking of it! Compare that with what I tell my children, that they are created by a transcendent God who loves them, who made them in his image. He is supremely good and wills their good and their inheritance will be with him forever, if only they love him and follow after him and obey his good laws.
I know we don't judge the truth of a claim based on how good it makes us feel or the rewards it promises. So I agree that because faith gives children hope, it doesn't make it true. But there can be no doubt that atheism offers them no hope and only darkness in the end. You can play nonsense games, "but the memory of daddy and mommy will be with you forever!", but kids are too clever to be fooled by that shallow promise for long. Nobody remembers Julius So-and-so who mopped the floor of the coliseum. No one will remember me or my children in a very brief period of time unless there is a God.