>You can always surrender and give your freedom away. Is this what you would choose if USA was attacked by China?

China hasn't had a war of aggression in how long?

China has all the factories and a standing army of like 600 million. If China wished, they could probably do significant expansion. But at what cost? To what benefit?

We as a species has discovered that war is pointless. You can simply buy everything you ever wanted at much lower cost. The cost of the war properly invested in yourself will set you ahead far more than what a war will bring.