New defense laws were passed and put into effect on the basis of the reinterpretation. Those new laws can't be undone without some new bills to undo them.
PRC is not entitled to controlling the island. From the strategic posture, it forms the mid link in the first island chain. If the PRC had that, then that would give the PRC military much better ability to operate in the open Pacific which is Japan's underside. Japan depends much more on the sea since it is an island country while the PRC has land routes. If Taiwan wanted to join the PRC willfully, then Japan's strategic posture doesn't matter. But since Taiwan doesn't want to be part of the PRC, then Japan is in the right to help Taiwan with the additional benefit of securing open ocean security. Because of the claim on the Senkaku islands, 9 dash line, and claim on Taiwan.. PRC attitude presents itself as something that cannot be trusted.
And he said "pressuppose". You guys really hang your conclusions on these SMCP articles too much.