The point is that nobody, certainly not the US, cares about things like territorial integrity or 'human rights.' Recent events have caused the US to have to completely drop the facade, which is in many ways a good thing (even if the situation in question is catastrophic and in no way good). It's all just a pretext to the expansion of power and influence. In the case of Taiwan the history of the country is important. The "Republic of China" was a nationalist force that overthrew dynastic China and eventually managed to unify the country in 1927. They were themselves then overthrown in 1949 by the CCP. Their leadership and forces fled to Taiwan (which was already a part of China), and overthrew the local forces there. The CCP did not pursue them beyond that and so the Civil War ended there.

The Republic of China then tried to gain international recognition as an independent nation but, to this day, basically nobody recognizes them as such. And eventually this led to the emergence of the 'one country, two systems' where China would allow some basic autonomy to the province, yet it would remain a part of China. This was accepted by most of the world, including the US. While simultaneously we then did (and are doing) absolutely everything possible to ensure the emergence of a new civil war in the region. It's not at all because we care about Taiwan (beyond it being in a strategically useful location), but primarily to weaken and destabilize China.