In addition to the current chip shortage economic concerns, it's also a national security issue. Many of the chips American tech companies depend on are built in Taiwan, and geopolitically that's pretty dicey given China's ambitions. It locks the US into effectively needing to defend Taiwan militarily if it gets invaded, or else the US economy would get crushed.

(I mean, I think we should make sure Taiwan is never invaded and remains independent, but it's also not great to need to commit forces against a rival nuclear superpower if it does get invaded, given that said rival superpower continuously and loudly proclaims that Taiwan is part of its territory.)