Yes in theory and that's Taiwan's best bet. But the US would never go along with that because guarding Taiwan's democracy is not the main objective even as it is the main talking point. The main objective is US interests, which are not served by nuclear proliferation or by losing Taiwan as either a bargaining chip to extract concessions, or a chess piece in a proxy war to weaken China, the main rival to US global dominance. Taiwan's value as a bargaining chip or as an acceptable battleground to both sides for a controlled conflict, is unfortunately greater than it's value as a democracy