Should I remind of the fact that Taiwan was very glad to sell any amount of semiconductors to mainland China.
If anybody had an option to strangle them economically, it would've been Taiwanese themselves.
China is world's biggest semiconductor market. If the tap will close on their semiconductor imports, so would've their economy at large.
Now, it's them, and not US who has to regret their prior indecisiveness the most.
Now of course attitudes have changed in Taipei, but only now.
I bet, in the next 5-10 years, Japan, and Korea will have their own time regretting being soft with Beijing just like that.