Earlier quoted context omitted.
That’s a bizarre idea. China wants Taiwan because they consider it a renegade province. I doubt they care about one fab.
Yeah. China has its stance consistently since 1940s, it is not that they woke up about Taiwan in 2010. It is more of a scorched earth plan. There isn't much of interest to US beyond TSMC. As long as it doesn't fall in hand of China, rest it will be OK to loose.
The Americans don’t really care that much about TSMC. Its fabs are highly dependent on parts, material, etc from more secured countries, which is by design, or they would have never allowed semiconductor industries to be setup in Korea, Japan, and Taiwan. They have much of the process locked up and a chip only gets made via free trade from multiple countries (with a lot of fate keeping by key allies, like the Dutch).