I should have qualified that with: if China is actually going to invade and we can’t stop them.
I don’t think you are going to convince the US leadership to go to war directly against a nuclear power for Taiwan. They won’t for Ukraine either. If Taiwan can resist like Ukraine they will supply Taiwan, but China is considerably stronger and more advanced than Russia. I don’t think that level of resistance is likely.
If I were Taiwanese I’d rather have the option of having a good place to go as an alternative to forceful subjugation by a totalitarian power.