Oh but the reasoning was different then.

Anti-communism was strong then, and arguably not as strong now. The PRC was much shittier of a power. The American people then were more willing to do what it took to be the hegemon.

Now, China is less communist, more powerful, and the Americans more isolationist. My view is that the US is less interested in Taiwan now because domestically there is less support for maintaining this and destabilizing that region.

I could be wrong. I’m definitely a kid in the sense I wasn’t alive back then. But from my read on history, we’re supportive of Taiwanese sovereignty, but it’s not as strong as it used to be, and Taiwan losing semiconductor priority would also decrease that support.