That's by design. One of the best examples of this happened to me over ten years ago. I was a cover driver. One week, one of the routes I covered was this good old boy who made alloy rivets. He made them by the order, so every order had a slightly different size. He would ship out these rivets in boxes about the size of a cigar humidor. About 12X12X4, roughly, and these boxes were heavy for their size. Usually around 40 to 45 pounds. Well, this guy learned his lesson. He was tired of losing his personalized merch to our system.
So what does he do? He makes his own boxes out of wood and rivets. He would put 10 screws to a side, on the top and bottom of each box. So he was using about 50 to 60 screws to each box. He would pass the cost on to his customers, but they were only screws. The real cost was the time making and assembling the boxes.
But, this being UPS, we still managed to smash and destroy his boxes. Not all of them, but enough to create a hiccup in his business.
But the real kicker? UPS sent out a small team of Loss Prevention drones to examine his boxes. Now, when I picked-up these packages, I could see that he went over and above what should be required of a shipper to protect his freight. I was hard to imagine how those packages could be damaged. But damaged, they were.
Anyway, out LP crew checked out what he was doing and left. About a week later, they called him, and told him that all of his claims were denied. The reason? Improper packing.
Needless to say, we lost his account. It was a shame, because all of us drivers couldn't explain why he was getting the scroogie.
It's not in UPS's interests to inform their customers, because no matter what, in the end, we will not pay.