The very high likelihood they'd get destroyed in return by our nuclear triad That's already the case so you've answered your own question. Even in a conventio

The very high likelihood they'd get destroyed in return by our nuclear triad That's already the case so you've answered your own question. Even in a conventional war neither side wants to get into WWIII. A war between US and China is not winnable by either side and so, quite obviously, neither side will start one.