I mean even discarding that. Hypothetically, let's say the US and China declare war on each other. Neither country would be able to invade the other. I mean, the US is good at force projection, but how in the world would any nation conduct an amphibious invasion of a country like China and manage supply lines across the Pacific sufficient to support an invasion force?
It just... it doesn't make coherent sense.
I mean we could land an army and send them support, just not enough to execute a conquest of China. Home field advantage is a major thing, you know