[kec]

I think you’re burying the lede there: this hypothetical war would be fought in Asia because China is completely incapable of projecting force to the North American continent. Without that ability to credibly threaten America China could not possibly win a war against it.

The conflicts which superpowers have withdrawn from have been against occupied nations which were in no position to ever become a future threat, this would not be true in a conflict with China, as China could conceivably develop the ability to project force and would be certainly motivated to do so during or after a real conflict.