Attacking and occupying a distant island in this age is getting more difficult, not easier. Look at the Black Sea, where Russia's remaining ships cower in fear in port, as they try to avoid super cheap marine drones. Massive missile attacks on a country can only do so much damage, and they harden the population against the aggressor.

If Taiwan has been paying attention, and I don't doubt they are in an age when it's becoming clear the US is a paper tiger that will never protect them, they are well prepared to handle a good chunk of their own defense, using the brain trust they have inside their nation. They have everything they need for their own defense now.