What is the US policy towards Taiwan?

President Biden to declare that the US will defend Taiwan militarily if China tries to take Taiwan by force. However, a moment later a White House official seemed to slightly correct the president's remarks by saying that the policy vis-à-vis Taiwan had not changed.

Exactly the same thing had happened some time ago. with practically the same declarations of the president and with a press release following these declarations to rectify the remarks of the President.

Biden seems to want to break away from strategic ambiguity. But what is the point of this strategy? Wouldn't it be better if the USA clearly said that it would defend Taiwan to deter China and reassure its allies in the Pacific?
What is the US policy towards Taiwan?
What is the US policy towards Taiwan?
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