Would you have been satisfied if the statement said "... are often strongly idealised ..."?

Aren't generalizations implicitly simplistic for the majority, while not necessarily true for the minority?

Couldn't you say that you are generalizing too much about the author's generalizations?

I found your anecdotes interesting, but I often wonder why people take offense at generalizations.

East Asian countries are incredibly distinct from each other. I'm not sure that they value drinking beer more than Germans, or wine more than the French?

But one vacation spot I know had drunk Chinese die from drunk drowning on a weekly basis. Which may suggest that some groups drink too much, and lack self-control.