I just went through this. My father bought a 2003 Jeep Rubicon, it pretty much sat in a warehouse with occasional drives around town. Bottom line, it still had the original Wranglers on with only eight thousand miles on them, they still looked showroom like the rest of the Jeep.

Tire shop said they would refuse to rotate them for liability reasons, said they look good to look at but theyll rot from the inside out.
They are light truck tires, and the Jeep is pretty light, they still urged I was rolling the dice on the highway.
I decided to heed the advice others too gave me, and replaced them.