The US can't do much about this today and in ten years it will be too busy with internal squabbles about which admiral is more politically correct. CCP has personal reasons to axe Taiwan. When the CCP fought the original "feudal" government, leaders of the latter fled to Taiwan. The island reminds CCP about its past. The capitalist nature of Taiwan is another reason: it's undermining the CCP ideology. TSMC is a distant third economic reason.