I think Dan Wang discusses this. He says US was always ruled by lawyers but in the past there was a culture of respect of engineers and engineering work. There was a can do spirit. Perhaps they lost it because they got richer and dominant and thus no longer feel the need to do the hard work.Breakneck has been pretty thumped on for all of those reasons, and in particular the silly engineer-lawyer opposition. The US has always been 'lawerly' but still managed to become a dominant industrial giant in the 50s and 60s in much the way China has now, so its decline is obviously more complicated.
China is obviously much more poorer and thus there is a strong desire to move up in both wealth and technology. There is also scarcity of infrastracture that only started to improve recently.
Maybe if China gets extremely wealthy and dominant in geopolitical power, it too will get relaxed, easy going and lose its engineering dominant culture.