... of a new culture and
connecting connection with people from ...
Another drawback is brain drain.
This is a strong point :)
to study overseas
won't would not come back after graduation.
and they
don't do not have any other ...
Avoid word contraction. However, you have a wide range of vocabulary. There is a smooth flow of ideas, for you have used transitional devices which make your points easy to understand.Nowadays, they have more opportunities to study abroad.
How about this one? I think it's better to also incorporate discussing these opportunities that the students have.
In the past, when students did a university degree they tended to study in their own country.
You should have related this in your intro before your thesis statement.