F1 is a "non-immigration" visa - meaning that it is explicitly designed so that the students do not stay after finishing the studies. There are "dual intent" visas which are designed with the intent of possibly staying, such as H1B. But technically, expressing intent to stay can be a reason to be denied F1 visa.

> Get the smartest from other countries, show them how good it is in your country

That may be true, but that's not what F1 is made for, by design.