It isn't actually dangerous in any meaningful sense to own a collection of steel tubes, in point of obvious fact. Especially if they are the most securely stored items in a household.
But you're right. I should wrap the kid in bubble wrap, hide him in a bunker under a mountain, and build a giant laser beam to shoot down incoming asteroids.
The danger that comes of firearms is a triviality. He is about 10,000 times more likely to fall down and hit his head and die from it. Or die in a car accident. Or eat a poisonous whatever he finds outside. Or contract some disease from the hordes of kids that haven't been immunized. Or drown. Or develop some malady and keel over.
Your fantasizing if you think you can engineer risk out of life. There are stairs in my house. Now THAT is dangerous. When you have kids, I hope you live in a single story home for the sake of your kid, since of course stairs are about 10,000 times more dangerous than guns. You'll do that, right?
Get a clue.