There are a thousand different ways that "escalated confrontation" with China can fall short of "direct conflict" while still negatively impacting TSMC's ability to allocate production to the west. That's why I said "escalated confrontation". If the only ways you can think of it happening is what Zeihan says, then that's simply a failure of your own creativity.

One moderately realistic one: Taiwan experiences something similar to what happened in Hong Kong, during a time when US leadership is not motivated to aid in its defense. This isn't a situation where China and the US are at war; we're still trading with China; and broadly speaking the economies of both countries are fine. But, Taiwan isn't, and whether it surfaces as key TSMC talent/tech leaving the country, military action, or just PRC subtly shifting TSMC's allocation priorities toward the homeland: western chip manufacturers could benefit. This isn't seemingly likely to happen in the next four years given the stated priorities of both sides of the political isle; but the right is shifting more-and-more isolationist every year, and no one arguing in good faith would speak with such certainty as you have on what happens 2028 and onward.