semiconductors is the key point for US/west "rally under the flag" when taiwan confict become real . because you can't rally american/western europe/australian/japanese/south korean with the true face off reason like
if we don't fight a ww3 with china now , they gonna break out 1st island chain design to contain them , they gonna control world most busy shipping lane , threaten our rule , our throne in pacific ocean and the world
only nut job will join the military or support a ww3 with china with those reason
but if you say : let fight china and help taiwan , save the semiconductor industy if you refuse china gonna control most advantage tech industry : no chip = no car , no washing machine , no TV , playstation , xbox , smartphone ...etc for your every daily life anymore
that gonna work much better , people fear the thing threaten their daily life comfort way more than some distance geopolitic issue
if china want to prevent this : taiwan semiconductor industry must be destroy first before invasion , or blockable even start
because there are no benefit doing after US/nato/west/japan already successful using it to rally their nations enter the war with china
once their nation enter the war that mean no chicken out because soldier die , ship sunk . aircraft shot down , military/nation pride under attack , superpower , most powerful military allied on earth lose face again "temu , wish.com ,cheap copy communist" their alway look down upon so most citizen will have no choice but to support the war