I disagree.
Penghu and Lanyu are large enough to host PLAN naval bases.
Once China has an independent semiconductor supply chain, the economic relation between China and Taiwan will fundamentally change. By then China can inflict extraordinary economic costs to Taiwan for breaching the independence agreement.
Taiwan is a functioning democracy and there will always be a pro-China party or parties to look out for any sign of the government breaching the agreement. There will also be spies.
Middle-class life in Taiwan is too comfortable for any popular support for joining any anti-China conspiracy once there is no threat of Chinese takeover.
You speak as if it is absolute. When USSR imploded, they were left with only promises where NATO took full advantage to where we are today. How much guarantee are you able to provide that Taiwan wont leap and host an US base whenever if China ever faces severe issues?
Taiwan isn’t simply about semiconductors but about national security. In exchange for your independence, CCP will face legitimacy issues where it could easily turn into a full blown civil war. What guarantees do you have the West won’t immediate fan the flames of civil war if they give independence?
Your option only puts China national security at greater risk because you want to do what is morally right but not what is necessary for a nation. The Americans will seize the opportunity when it presents itself just as they have in Ukraine. The world is not black and white. Neither will the Americans play by the rules even if you are strong.