Not only that, it costs many years and billions more to build the cadre of expertise it takes to run the fab at more than zero yield, and you also need billions

Not only that, it costs many years and billions more to build the cadre of expertise it takes to run the fab at more than zero yield, and you also need billions more invested in making huge silicon monocrystals and incredibly pure chemicals. Chips are a strategic technology, though parts of that ecosystem have become more of a commodity, it's still not the sort of thing where Russia, say, could build more than a few trailing edge chips.