That is how it will start, anyways. The US will almost certainly get involved, and possibly NATO if things get too dicy.
Also, if China attacks Taiwan's semiconductor facilities aggressively and destructively right at the exposition of a conflict, there will be no strong incentive for the US to get involved because its largest interest in Taiwan will have been demolished.
To my initial point, though...why would the US care about Taiwan in the morning if all of the fabs get destroyed overnight?
https://foreignpolicy.com/2019/05/05/how-to-win-americas-nex...