I'm not moving the goalposts, I'm just pointing out that it's a bit disingenuous to frame a question about what should happen in an unresolved civil war as a question of nations and their sovereignty. It would be disingenuous to frame Russia's intervention in Ukraine as defending the independence of an entire country, I think it's a similar situation between ROC/PRC, the primary difference being the length of the dispute.

Which is relevant if we're talking about how one can consistently be anti-imperialist, I think. I agree it's a bit flippant to say stuff about 'giving up Loser Island' but I think it's important to recognize that it's more complicated than 'two independent countries fighting over the territory of one of them.'