I respectfully disagree. Not insofar as thinking you're wrong, but more in terms of the people with which I personally have contact. Most if not all of the (eastern) Asian people that work with me come from upper-middle to upper class backgrounds.
It may very well be the case that poverty-stricken people are more concerned with saving face. It's clear, however, that it is not the only reason. I attribute my "clash" to be the result of true cultural differences. When I ask him how it should be handled, he definitively says that his chemicals are his business and that mine are my business. He interpreted my trying to help as an insult. I should also add that this is one person and one example that I found to be rather concrete. I detect many instances of this cultural characteristic in my day-to-day interactions with many people.
I'm not saying that it is a flaw on his part, or on the part of the culture for that matter. Instead, I think that it is a real trait which is not beneficial in the context of western culture. Similarly, I would probably be considered nosy or rude by eastern standards.
Generalizations are indeed dangerous territory, but let's not forget that they can also hold some truth. We survive by making generalizations, and use them to interpret the world around us. It's important to keep an open mind, but just as important to trust what we know to be true when assessing various situations. Eh, just my .02