Entire local economies are run around chip manufacturing in South Korea and Taiwan. Plus it’s seen as a matter of national security, the US is more likely to defend and support them if they have these valuable chip plants.
I predict if the US can make better chips than Taiwan and can fulfill domestic production itself, Taiwan will shift from an asset to a burden and the US would stop caring nearly as much. The rhetoric will stay approximately the same, but I doubt the US would go to war at that point for Taiwan.
Entire local economies are run around these chip manufacturing. Plus it’s seen as a matter of national security, the US is more likely to defend and support them if they have these valuable chip plants.