That might not be -as- true as you think it is.
But after committing themselves to succeeding without a safety net, and crossing an ocean or two on a gamble mixed with courage and a bit of grant money, foreigners who enroll here are of high quality.
A lot of our natives are this: "You should go to college, okay?" "Okay."
For a lot of us Americans, we're so surrounded by our opportunities, that we don't see them as any kind of inspiriation. If we get inspired, we're high quality too.