Why are all the outstanding talents trained in our country willing to choose immigration?

The national environment is different, so why so many people choose to emigrate is definitely not accidental. The more you know about this country, the more problems you will find. High housing prices and poor welfare are obvious problems now. In the past, I also felt that people trained by the state traveled to other countries, which was unpatriotic, but now I understand! Another phenomenon can reflect some problems, and that is why all the people who won the Nobel Prize are from China or China, not China!