There are plenty of places where it would make sense, actually, but Pigeon Forge and Gatlinburg are very much not on that list. They are towns surrounded by mountains where once you get off the strip, you may not even run into a gas station or grocery store for a while.
Also, that was 15 miles, not 15 minutes. I think it took us more than an hour to get there with all the traffic. Excellent example of a tourist trap.
A related quirk of the area is its onetime attitude towards free alcohol samples, which I wrote about last year: https://tedium.co/2024/11/10/free-sample-history/