The idea that the US protects Taiwan from a possible Chinese invasion over chips is one of those things that sounds believable but really isn't going to happen. From China’s perspective, the cost of war is much higher than the cost of developing these chips themselves. In the worst-case scenario, they would be 2-3 years behind the cutting edge, which is not mission-critical. Most electronics (civilian or military) do…
I'm not saying China is right in wanting to invade Taiwan. But that's closer to their real motivations than anything having to do with economics or technology. And its important to understand your potential adversaries motivations because that will inform their decisions and tactics.