It's not a "fuck China" thing. It would be a severe short-term tactical blunder to lose Taiwan, not even considering the moral perspective. Modern military cannot function without semiconductors. And yes, we could (and are starting to) move those facilities to the US, but that takes a lot of time to complete. Not only to complete, but to get up to speed and running efficiently. If Taiwan is lost, our enemies bolster their semiconductor supply, and we lose the majority of ours.