One of America strategic goals is to force the world to reroute supply chain around China, for everyone to all decouple from China, and for the world to isolate China esp. in terms of trade, tech, economics...
A complete blanket chip embargo and ban will achieve this, at great cost to everyone but US sees its hegemony at stake and short of nuclear war this is it
Almost all products use chips these days. Say tomorrow US bans all intel and amd chips from entering China, zero exports... Well Dell laptops that are made in China will cease production... Dell isnt going to rework their product line to support a SMIC chip even if there was one, they will simply be forced to move their assembly line to india vietnam mexico etc
Even if China catches up in five years, by then the vast majority of global companies will have been forced to move their supply chains and factories out of China...
See the picture now?
Okay I appreciate the seriousness of that situation and like I said, it's certainly a economic threat to China (and the world) but it's not an existential one like nuclear. Of course it could become so devastating that it approaches the destructiveness of a war but it isn't and remains to be seen just how bad.
I'm very opposed to the attitude of Taiwan is helping the Americans and complying with their demands... we must make Taiwan pay. That is a lowly way to interpret the situation indeed.