You're eliding two very dissimilar things. I'm not saying you can't group people and say quantitative things about them (like GDP). That would be stupid.

I'm saying I have no idea what a statement like "the Chinese value hard work" means. It is not testable or quantifiable, and it's genuinely meaningless. Now maybe you could publish some survey data that shows Chinese people more value hard work. That might add something to the conversation.