Enough of this crap, I want to hear directly from god

[Angrboda]

I can suggest that there are facts about children which explain this.

Nor do I have to prove that there is no god to demonstrate that purpose can be and is conceived of without one.

And what are these facts ? You provided none. Children are just tilted towards belief, regardless of their culture or their parents' influence.
Of course you can loosen the definition of purpose to take out anything about the divine or heaven. But that would be just you playing with nomenclature.

The definition is that loose to start with. The one playing with nomenclature is the one claiming heaven or the divine are required.