Not quite so. Taiwan was ruled by the losers of China's civil war until about the 1990s (the modern party counterpart is the KMT). From their perspective, "One China" is about "we deserve to own all of China" and concomitant refusal to accept their loss in the war. Their opposing party (the DPP) instead advocates Taiwanese independence and refused to support the "One China" policy, but have declined to make any strident moves towards changing policy in power essentially for the reasons you mention.