Wow. So no one else can learn or make anything. We are helpless idiots.....
Bean counters saw to that.
State of the art semiconductor has a significant concentration in Taiwan. Of course there is expertise elsewhere. There is often, usually, recovery from profound impact. Hiroshima is thriving. Humanity got past the dark ages. Civilization didn't die when Rome fell, and so on. The world goes on with new Atillas, Hitlers, Stalins, Maos, Bidens, Faucis - and there are intervals where good guys have the upper hand. Humanity is a dynamic thing.