We have lots and lots of chip factories in the West. A very important one just lost thousands and thousands of wafers because the Texas power grid went tits up, and it set the companies using it back by months. There's foundries being built all over the world. TSMC just happens to be the first to have an extremely expensive, extremely difficult process down to a reliable production setup, so all the orders that absolutely have to be on that process are going to them. They also happen to employ most of the world's expertise in leading-edge lithography tech. But if you look beyond the absolute pinnacle of production processes, and into the >100nm range, there are literally hundreds of foundries around the world, many of them in the US and Germany for example, churning out what was top-of-the-line a decade ago.