I think maybe we do. I just used the wrong word, apparently. I mean keeping the Chinese military from accessing Taiwan.
By creating an exclusionary zone, it then sets the "line in the sand" of which nation is the aggressor. And it also forces them to basically "put up or shut up", and a final chance to back down.
Myself, if it ever got to that point, I think it would largely be a repeat of 1962. Where the more rational heads and diplomats would be working frantically behind the scenes and trying to do all in their power to call things back. But one thing must be remembered when reading any diplomatic agreement, the words really do matter.
- to consider any effort to determine the future of Taiwan by other than peaceful means, including by boycotts or embargoes, a threat to the peace and security of the Western Pacific area and of grave concern to the United States;
That is something that diplomats are aware of, and would be taking very seriously. The US and other nations do not use the word "grave concern" lightly. Essentially, it is a clear statement "We will go to war if needed to ensure this". In "diplospeech", "grave" is about as severe as you get, and is a strong warning to others to listen when it is used.
But by creating a line like that, it then becomes China that has to make the first offensive move. And no matter what they and others may think, "they are not all that" to use a common phrase. Their military is unblooded, their navy has little training and experience. They have little logistical reach, and would be trying to conduct a kind of operation they have absolutely no experience in. That all is a recipe for disaster on their part.
Ultimately, it does not matter what President Biden wants, he has little say. This is a treaty, and the military and Congress can do a lot even without him. That is the thing about treaties, they can take on a life of their own, as has been seen many times. Germany invades Poland, England and France have absolutely no choice but declare war and respond. The President could try all he wanted to try and order the US to stay out of it, but it is an official law under
Public Law 96-8, 22 U.S.C. 3301 et seq Congress could simply draft a resolution and override what the President wants.
And politically, the President would be a fool if he tried. Because outside of outright forbidding the US military from doing its duty, his refusing to follow this law could actually get him impeached. Violating this is not the sorta-wobbly issues that most people try to bring up, his ordering the military to refuse to defend Taiwan is literally outright violating US Law. Just as if a President ordered a state to ignore Roe V. Wade and to not perform abortions.
But China would have to be the one to take offensive action. And if they were to try, then "the gloves would come off". And most really do have no idea the might of the US military if it came to that. For the last 50 years, it has largely only been involved in "Police Actions", where the rules of engagement were very limited and very proportional. That would be an outright attack, and heaven help the nation that pushed that.
Even Argentina was not foolish enough to try that kind of nonsense with the UK in 1982.