

I don’t really disagree with you. To me the Polynesian backstory highlights that it is all just politics.
If you like to argue the history of history then there most likely are no records of Polynesians in Taiwan but there could have been.
from migrations out of Taiwan between 3000 and 1000 BC
The oldest attested Chinese writing comprises a body of inscriptions produced during the Late Shang period (c. 1250 – 1050 BCE), with the very earliest examples from the reign of Wu Ding dated between 1250 and 1200 BCE.[
For China, there exists a bigger risk than losing business. The USA could do a naval blockade. China cannot survive that without Russia. They won’t sacrifice their security for short term profits.