It's about making war too costly to China. Not about preventing China from taking control of TSMC. Destruction of TSMC would make such conflict very very incon

It's about making war too costly to China. Not about preventing China from taking control of TSMC. Destruction of TSMC would make such conflict very very inconvenient for large part of the world. And China wouldn't want to upset literally everybody. It's probably close to usage of a strategic nuclear weapon.