If anything, it appears SC is a little farther away. Sucks if you're an SC resident affected by this.
North Carolina has a much higher gas tax added to the prices so lots of us choose to fill up dpwn there when we can. Also as anyone who has traveled to Myrtle Beach knows you can sell and buy fireworks in South Carolina. Both of these created a ready market for his little store and a decent profit for his family owned business.
Frankly I think a doctrine of "if it ain't broke don't fix it" should apply. This has been going on for hundreds of years. Let it go. Draw the map to suit what has been the reality for several generations.
I don't always talk to UVa Grads but when I do I always order the Large Fries.