This is too simplistic. Samsung and Globalfoundires have fabs in the US that are close to leading edge. There are other fabs that are leading edge for other ty

This is too simplistic. Samsung and Globalfoundires have fabs in the US that are close to leading edge. There are other fabs that are leading edge for other types of chips e.g. Texas Instruments The fact is that the capital expenditure costs to create a leading edge Fab are insane, and economies of scale form a big moat. The economics do not really support more than a few leading edge fabs, and now that Intel has had internal issues they are behind. Maybe they will catch up- however throwing money at the problem does not seem likely to me to fix the problem. Moore's law is ending and the difference between die shrinks isn't as dramatic as it used to be. It remains to be seen if electron tunnelling can be easily be dealt with... However fabs are sexy and people will chase the money until the process breaks down.