It's true that bad schools make poor neighborhoods unproductive for military recruiters. They usually don't want recruits who dropped out of high school or have

It's true that bad schools make poor neighborhoods unproductive for military recruiters. They usually don't want recruits who dropped out of high school or have low ASVAB scores. But a lot of young people in those neighborhoods are also disqualified because of poor health (particularly including obesity, asthma, and various mental conditions), history of illegal drug use, and criminal records. These social issues are all highly correlated.