There was a video (perhaps even from kurzgesagt) which describes how critical it is for our society to allow as many people as easy access to knowledge as possible and not only for obvious reasons but also to increase the chance for all of us that the hidden genius is finding a cure for cancer.
You can even study for free in Germany as an non German. You know what happens? Those people might stay in Germany and make Germany a better country.
Imagine a world were we compete globally with the best education system. Let's allow more people to shape our future.