alt Hacker NewsYou're right that this isn't why China want's Taiwan. But the point is that it would also make China poorer. In fact, it would be highly likely to cause a global recession of a magnitude that could threaten the Chinese government due to pressure from it's own citizens.
It actually wouldn't. It would hit many US companies that rely on TSMC's latest nodes like Nvidia and Apple. And TSMC also has its Nanjing fab in China. What this would do is strengthen Samsung and make China even more determined to accelerate SMIC or Huawei's efforts to build a TSMC equivalent. Apple would be more impacted than Huawei, because Huawei isn't using TSMC at all. So in practice, this would hurt the US the most, since it relies on Taiwan based fabs for leading edge nodes.