That may well be the military analysis but it's a great deal more nuanced in reality: to more accurately assess the realistic response to a Chinese attack on Taiwan, we would need to know how the American population would respond (and the other Western populations). Given we're likely to be up to our necks in Ukraine still, would there really be much support for a leading role in a war in the Far East? With a weakened American President and the GOP looking like they're gathering momentum again, there's a very realistic chance of the country deciding they don't particularly want to get involved too much (there will be cries of 'look at the past history of US involvement in the East').
Then there's the financial situation: meaningful embargoes on China would be next to impossible for now: we import so much from them that there's no way the west could possibly re-engineer supply chains in such a short time frame; there'd be massive inflationary pressure that would hit pretty much every aspect of modern life and quickly impact the lives of voting citizens.
By far the most logical approach for a government to take, surely, would be to concede that Taiwan is 'only' important to the west because of the chip manufacturing it supports and it would follow that reducing that dependence is, by far, the cheaper and less politically risky strategy. Yes, it throws Taiwan to the wolves - but since when has that ever kept a politician awake at night? (cf. Middle East, Europe after WWII - and WWI - and most of Africa for time immemorial).
This think tank is simply a public display for the benefit of the Chinese. They're aware of the strength of the Chinese, their show of muscle with recent rocket launches and the west can't respond in kind. Writing up a 'we have a plan' paper is a more diplomatic way of showing the west's support.