The "silo" isn't the problem, it's the lack of opportunities for employment, lack of access to basic amenities, etc.
People in wealthy silos, in downtowns, do fantastically. The problem was the systemic racism in the US, that enabled such a state of disinvestment and segregation, not the particular form of architecture.
That is an incredibly offensive and racist thing to even concieve, much less try to put into somebody else's mouth.
The problem of public housing's inaccessibility, being cut off from jobs and basic necessities, is well documented. Segregation has been a huge problem in the US because it has been used to deny basic opportunity to Black people, not because a lot of Black people are living together.