Tobacco definitely doesn't bring in as much money as cotton, corn, or soy does per acre, but for the soil conditions of these regions it's grown on a large scale, it has its merits penny to penny per acre. What you gain in money for the crop for fruits and veggie, you lose in labor, storage, and shipping costs. Tobacco affords you the luxury (like cotton) of setting aside a crop for a few years for prices to rise.
Virginias are a little more touchy, because of the cure. But, different pipe tobacco companies probably have different relationships with farmers.