The US does not need access to or business with China to be "viable". That's a caricature. Some replacements might be slower and more expensive to spin up than

The US does not need access to or business with China to be "viable". That's a caricature. Some replacements might be slower and more expensive to spin up than people and industries have wanted or been willing to do, but there's literally nothing unique in China. The cost advantage, at this point, has eroded greatly and is on trajectory to continue doing so (especially if they are to meet their own stated and industrial policy goals). Also, China is dependent on lots of thing from other countries, including the US, so the notion that they can dictate rules "with zero pressure" is wrong. Finally, the debt piece is not something I understand well, but I almost exclusively see that addressed by experts as a faulty notion. At least, the notion that all China has to do to cripple the US suddenly start selling tons of US debt or dollars is total fantasy.