Do you know what foods Dollar General sells ? You might be surprised.... I mean, it ain't Whole Foods but much of it is the same brands you get a Kroger, etc.
They sell engine oil - Valvoline, Castrol, etc as well as various ATFs (name brands too). They sell Tylenol and other name-brand medications, name-brand bar soap, shampoo, etc. They sell laundry detergents.
There's no reason for people to be afraid (or too good) for DG. I go there for certain items and because the stores are much smaller than Kroger, Walmart, etc so I'm in and out quicker. There's nothing wrong with their pricing either.