Brake Disc Pads problems of the 2002 Chevrolet K1500

I have a 2002 Chevrolet silverado truck. The truck only has 28,000 miles on it and recently began making grinding noises. I took it to century Chevrolet and was told that all 4 rotors and pads need to be replaced. With only 38,000 miles on the truck that seemed crazy. When I questioned this they told me that they hardly ever see this brake problem happening and it's because I don't drive the truck enough so it's rusted out the parts. Rusty parts in colorado is another thing that didn't make sense. They could only do the front brake repair because of my camper so they replaced the front rotors and pads for a little over $400. I started checking around about the brakes and discovered on the internet that there were many similar stories from other silverado owners. There is a large number of people who own these vehicles with parts that just deteriorate. Chevrolet continues to deny that it's defective parts and instead tells people that it's their fault for not using the brakes enough. We use this truck mostly in the summer for camping and traveling but do drive it in the winter so I?m unsure what is considered the proper amount of ?braking? time. The dealer couldn?t give me an answer on that question. This is happening to a lot of other people and they should be warned that part of the maintenance on this vehicle is $1,000 brake job every $25,000 miles or you won't have any brakes. Thank you for your time.