When I went through this I was deeply involved the paperwork and the impression I had was that the whole process is far more nuanced than a computer-generated g

When I went through this I was deeply involved the paperwork and the impression I had was that the whole process is far more nuanced than a computer-generated go/no-go. A minor paperwork error, DHS agent on bad day, or misunderstanding a qualification or another candidate deemed more applicable would do the trick.