Do you have any data to support your disappointment? There seems to be data supporting the GP's observation, which is different than your crude strawman.

It's not unreasonable to look for fire when you smell smoke.

"A 2016 study of more than 100 UK universities by The Times found that non-EU students were four times more likely to be caught cheating than UK and EU students. In the US, they were found to be five times as likely to be caught cheating than their local peers, according to a Wall Street Journal analysis of data from 14 leading US colleges." https://studyinternational.com/news/the-complex-problem-of-a...

"Public universities in the U.S. recorded 5.1 reports of alleged cheating for every 100 international students, versus one report per 100 domestic students, in a Wall Street Journal analysis" https://www.wsj.com/articles/foreign-students-seen-cheating-...

In 2015, 4,540 international students were enrolled at Iowa. Of those, 2,797 were from China. That’s 9 percent of the school’s student body. Most or all of the students accused of cheating are Chinese nationals. https://www.reuters.com/investigates/special-report/college-...