Provided the article wasn’t exactly clear and I have no way of knowing exactly what the author meant; I think things like civil unrest can be thought of as a “crack”, the US 1st amendment almost encourages small cracks and they quickly get filled in and we move forward with things slightly adjusted (for better or worse). Although in many regards the process is still flawed, the ability for the us to peacefully transfer power at all levels of government every is really quite remarkable!

Where as China being authoritarian any civil unrest has a much higher likelihood of overthrowing the government in a violent and expensive way. Transitions of power happen infrequently and are very dangerous particularly at the highest level given how synchronized authoritarian governments tend to require.

Everything in life has trade offs. And while the Chinese have accomplished things the US hasn’t; imperfections in government are inevitable and the US is arguably more resilient to these imperfections over extended periods of time given the US ability to effectively and efficiently accommodate changes to address these imperfections.