I think it is more a symbol of the failure to assimilate the ancestors of the slaves (since Africans themselves are much better assimilated in the US). There is no “education” taking place where these students attend class; admitting them is just a delaying action to slow the birth rate (successfully) and hope they’ll end up gainfully employed ANYWHERE (often by some form of government or government agency). Most certainly have no value in the private sector.
“The slave does not dream of being free, he dreams of being master.”