Hi Juliank, Trust me I do understand your concern. But I am not justifying plagiarism here. I do not have knowledge of all the cultures. But, I do know that the knockoff products from China which you are referring to are part of business strategy and not culture.
In my understanding culture is social bhevaior which some community is proud of. And I know no community is proud of plagiarism.

I am not siding with plagiarism. In fact, I oppose it. But my concern here is the definition of the culture.

:D