The key flaw in your perspective, is that you are not invisible to your son. Your son can see you, and react to you, and reach understanding out of this.

Now if you were not seen nor heard to your son, would you find it him to be idiotic if he were to believe you existed without proof?

I do so dislike how the wind is used as a means to attempt to rationalize how something can exist, without being seen. The difference is that the wind is comprised of air, a colorless gas, showing that it has substance, without refracting light according to physical law. This is completely different from something that has no phsyical substance attempting to move limbs in the breeze.

And yet again, despite the cliche, there have been several thousands of clear, level headed people that have been lead astray simply to fit into the crowd, simply to accept an answer that was given them, and believe it to be true. It works because it is human nature.

This is evident through propaganda, social predisiposition, and is accepted so widely as an answer, simply because no true answer can ever be found.

To quote Swordfish: “Misdirection. What the eyes see and the ears hear, the mind believes.”