Making unreasonable requests repeatedly is a form of harassment not "Ask culture."

It's not like people in ask cultures just go around asking random strangers to hand over all their money...

But that's ask culture in the end. Guess people can only guess, whereas ask can always guess, but then fallback to asking.

Guess also assumes a very similar shared context and understanding. This leads to xenophobia, because "those foreigners" seem so rude simply because they "guess" with a different contexts. Again, asking is superior.

I think that's a given that needn't be mentioned in the article. The author isn't stupid, and clearly wouldn't advocate for making outlandish or completely unreasonable requests even for the "askers" mindset.