If not, why have an education system at all?
The concept that "my kids" are better than other people kids because they are like me is extremely silly on many levels. They might not share your ideals and even if they do, it promotes a single line of thinking.
- That happens to every country - One in three top US professors educated overseas https://www.timeshighereducation.com/news/one-in-three-top-u... - Most of their classmates will be foreign students too https://www.insidehighered.com/quicktakes/2017/10/11/foreign...
Both your sources are for the US only. How did you get to 'every country'?