Have you heard of Operation Paperclip? The moment China steps in Taiwan, all those vital TSMC engineers will be flown to the US along with the critical IP and given a blank cheque to replicate Taiwan operation on US soil ASAP. TSMC is preemptively building the infrastructure there in preparation for such an event, so it can outlive whatever happens to Taiwan. TSMC has little inventive to tie itself to Taiwan and its people who are not its employees. Every big company thinks and acts like this. Taiwan can't force TSMC to stay there if it doesn't want to.
Have you heard of Operation Paperclip? The moment China steps in Taiwan, all those vital TSMC engineers will be flown to the US along with the critical IP and given a blank cheque to replicate Taiwan operation on US soil ASAP. TSMC is preemptively building the infrastructure there in preparation for such an event, so it can outlive whatever happens to Taiwan. TSMC has little inventive to tie itself to Taiwan and its people who are not its employees. Every big company thinks and acts like this. Taiwan can't force TSMC to stay there if it doesn't want to.