Do you believe your atoms are behaving in the same manner as the atoms in a bridge?
I don't believe it. It's what's supported by the evidence. The atoms in the bridge and my body all behave according to the very same rules. The atoms in my body and in the bridge all work according to the same atomic theory of matter at the macro scale, and whatever it is that applies at the micro scale.
Imagine that life is a water molecule. A bridge is a carbon dioxide molecule. They both operate according to the same principles, and yet are very different from each other. I don't see what's so nonsensical about that.