this is forgetting that the US exists. The US doesn't want China to invade Taiwan or to control TSMC. if China invades, is very much in the US interest to fly everyone important at TSMC and their families to the US, and to blow up the buildings. it's also in the TSMC employees interest because living in a warzone sucks. Furthermore, this policy is a dissinsentive for China to invade since it means that invading won't provide an economic benefit.