This article completely fails to address the reality of visiting South DeKalb. Go drive around in Google Street view and you'll see abandoned commercial property after abandoned commercial property. Businesses struggle to exist there.
The problems there cannot be fixed by zoning more commercial real estate and the comments about healthy restaurants are laughable: look at the restaurants that thrive in the area in question and look at the areas with the abundance of healthy restaurants. There's zero overlap.
If a salad bar chain could do well in South DeKalb, they'd have no shortage of venues to consider. Atlanta is self-segregated in a multitude of dimensions that are much deeper than race.