None of the sorry attempts you used convey the idea that the author was trying to convey, which is that the felling of a giant by a boy with a sling and a stone is something extraordinary.
That is why the story made it into the Bible in the first place. It is used to illustrate, that with Gods help, extraordinary things can happen to ordinary people.
You may wish to deny the extraordinary power of God by trying to change the meaning, but that’s what still taught in Sunday Schools all over the world. And the story of David and Goliath is used to illustrate the same.
> You may wish to deny the extraordinary power of God by
> trying to change the meaning, but that’s what still
> taught in Sunday Schools all over the world. And the
> story of David and Goliath is used to illustrate the same.
We must not be speaking the same language.