Without the tools, the knowhow is worthless. Apart from that, Taiwan say they have made sure TSMC will never fall into the hands of China.
I’m not disputing it will cause major disruption in western supplies too, obviously neither Samsung or Intel will be able to replace TSMC immediately, they are behind both on quality and volume, and they are the only existing alternatives to high end process manufacturing. Apple doesn’t know shit in that regard, they are not a manufacturer, and TSMC is not a chip designer.