[pphysch]

> I don't know what "military power projection over China's coastline" even means

That's the problem. There's massive lack of historical education on this topic. The Taiwan issue greatly predates TSMC.

https://en.wikipedia.org/wiki/Island_chain_strategy

https://en.wikipedia.org/wiki/First_island_chain

https://en.wikipedia.org/wiki/First_Taiwan_Strait_Crisis