Why is Germany not a popular country for studying abroad or emigrating?

First of all, Germany is not an immigrant country, with a small land and a large population, and immigrants are not welcome. Secondly, the use of German is very narrow. In just a few countries, the total population of the world exceeds 65438+ billion. Moreover, the education level of Germans is relatively high. Most people under the age of 50 know some English and use English more in foreign economic exchanges. So few foreigners learn German. In addition to the advantages of mechanical manufacturing, most people don't want to study in Germany because German is difficult to learn.