Earlier quoted context omitted.
The problem with the west is that it is largely leaderless. Actions happen due to some interest group getting their way. China on the other hand is very much lead. I think the west constantly bringing up Chinese demographic and other issues is just the west being lazy and ignoring reality. China is becoming unstoppable. Democratic nations banding together or building new supply chains are pipe dreams.
Authoritarianism has been tried out around the globe in the 20th century multiple times, but each attempt failed. In fact, moth western nations were kingdoms at the start of the 20th century, and WW1 and WW2 turned most of them into republics.
The fact that Democracy has had a really good run for the past 100 years is nowhere near a guarantee that Authoritarianism won't rise again for the next 100.