> to restrict sales to domestic production only
You think people will stop buying NVidia GPUs, AMD GPUs, PS5, XBox, Nintendo Switch, iPhone, Pixels, Samsung Galaxies, and a litany of major automotive parts from Microchip/STMicro/etc. etc.?
Because none of these are made in the USA. The only major chips made here are Flash/RAM by Crucial, CPUs by Intel, and some lower-tech (but still important) chips by TI. The vast majority of chips, well over 60% of the worldwide supply, is made by TSMC IIRC, and another huge chunk are made by other companies located in Taiwan.
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Furthermore, Taiwan is a close ally who has extremely friendly relations with USA. Yes, there's a war-risk with China here, but Taiwan fairly competes with us. I don't think anyone has a single piece of anti-Taiwan hate inside of them.
Its not a protectionist thing. Its purely the "what if China attacks Taiwan" thing. Economically speaking, trade with Taiwan and USA is a good thing. Geopolitically, trade with Democracies is a good thing, and trade with a century+ old friendly nation is a good thing.
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Taiwan can create this tech because they are smarter than us and outcompeted us on this subject. Its not "low tech", its extremely difficult chemistry, high-end PH.d stuff here.
Taiwan is basically the Vulkans from Star Trek. They're smaller, more technologically advanced, but weaker militarily. They're so obviously good allies that its unthinkable to do anything against them. We need a "just in case" plan if trade between our nations gets interrupted because chips are a strategic good, but... cutting them off would mean that they ally with someone else and that's even worse.