It could be a problem, but usually isn’t. The (darkly) funny thing in the case of Germany is that this lack of diversity in education has created a generation

It could be a problem, but usually isn’t. The (darkly) funny thing in the case of Germany is that this lack of diversity in education has created a generation with the fertility rate of South Korea (ie dying). In this case, the state creating a monoculture that results in the ‘destruction’ of the existing state goes to show why evolution values diversity far more than monocultures.