I agree with your assessment. I am not US American though. I live in America (Canada specifically) but I was born and raised in Europe. I'm afraid the cynicism in my original comment requires this context to be received.

In my opinion it seems to reflect an expectation in culture in general. Most movies filmed in Canada do not actually depict Canada. I lived in Toronto for a while where there are almost as many NYPD cruisers as there are TPS cruisers and as many Yellow Cabs as there are Beck Taxis. International YouTubers translating things into Imperial Units and US Dollars in videos is another often seen accommodation to this.