Josh Luo's whole argument is that because China doesn't command the whole supply chain, thus when the world shuts off on China, China will find it difficult to develop because many of the key technologies are outside of China.
This argument has a fundamental flaw in a key presumption, and that is when the US is not at good terms with China, the world will shut China off. In fact this couldn't be further from the truth.
First of all, there's no way the US can truly cut off all ties with China. It's simply not doable. What Trump can do is to impose tariffs, but without Chinese exports the US economy would crash too. Yes some production may shift outside of China, but which country has the infrastructure and labour pool in place to take that kind of shift, to fill in the void that China leaves? The truth is no country in the world has that kind of production capacity, at least not in the short term.
Also, China is the largest trading partner of Japan, Taiwan, South Korea, ASEAN, Australia, New Zealand, and quickly on its way to become the largest trading partner of Europe. Why do these countries want to shut China off or severely undermining their trading relationship with China by cutting off key technology supply, at the risk of undermining their own economic growth? Just because the POTUS thinks so?
Let's face it, America's global sway is weakening by the day. This doesn't mean it's not the sole superpower anymore, it just means that when other countries' real interests are at concern, it's not easy to simply convince them to risk all of that for America's unrealistic wishes.