Taiwan not being part of China does little or nothing to "weaken" them. It's sort of like arguing that Peurto Rico being independent would destabilize the Unit

Taiwan not being part of China does little or nothing to "weaken" them. It's sort of like arguing that Peurto Rico being independent would destabilize the United States. China chooses to make Taiwan a big deal to them, but it really doesn't have to be. The United States for decades has tried to make Taiwan not a big deal, creating policies of strategic ambiguity, cozying closer to the PRC, while still standing up for Taiwan's right to be independent. If you wanna try to go all real-politik here, sure it's useful to the United States to hold something back from China that they're weirdly fixated on. But these days the real value of Taiwan is mostly about semi-conductor supply chains. China's antagonism and petulance toward Taiwan is an own-goal they choose to continue making. It's not the United State's fault, and it doesn't have to be this way.