> The decoupling is driven by a belief by some in the American government that they can somehow blunt the economic development of China and maintain American geopolitical hegemony into the foreseeable future.
You don't come out and say it, but your implication is that this is not possible.
It is not obvious to me that that is the case.
1. China is a low trust country. There is a deep culture of fraud and deceit. This will be a difficult thing to change, which I believe is a precondition to being a tier 1 super power.
2. People like to extend trends into the indefinite future, but macroeconomics is superstition at best. The stagnation of Japan caught just about everyone by surprise. I think there's at least a 30% chance this happens to China, based on some of the reports I've seen coming about of China related to debt and real estate.
I think there is a good chance for China to reach tier 1 status, but it doesn't seem like a foregone conclusion to me. Given this level of uncertainty, it seems reasonable that some powerful Americans might not want the US to go gentle into that good night.