China needs TSMC to have economic and political leverage. US wants TSMC to become an American owned enterprise so it can prop up Intel.
South Korea or Samsung rather see TSMC burn to the ground giving it monopoly marketshare. It benefits if US and China destroys each other in the process.
There's like only 3 guys in town with TSMC dominating the market and it just happens to be in a very risky region.
Just like the pipelines that were blown up by Ukranians I can't help but feel we will be seeing similar sabotage to TSMC should a war occur.