I've had people bring me tables, dressers, and chairs that they were convinced needed a full refinish. Half the time they were ready to throw the piece away.
Almost every single time, the wood was structurally fine. It just looked terrible because the fibers had dried out over years of sun, dry air, and use.
When wood fibers lose their natural oils, the surface scatters light in every direction. That's the flat, faded, lifeless look. It's not damage. It's dehydration.
Most of these pieces are 30 minutes away from looking completely different.