Taiwan is a global economic chokepoint through which most of our advanced tech, from AI to EVs to Xboxes is derived.

Look at what happened to prices when TSMC shut due to Covid. Now imagine a conflict happening on the shores that damages their infrastructure. The only company in the world that makes 3nm UV chip lasers is Trumpf and its both expensive and delicate to reproduce.

A chinese invasion might not even be about taking control but crippling their output with the only other option being chinese chipsets, around the 8nm mark flooding the market. These are not bad chips (Huawei seems to be doing ok) but import tariffs on them would cripple Nvidia, Apple and Tesla.