I agree to a degree. The belt trailer is bad about weight transfer. When you first start unloading all of the weight moves to the back of the truck. Many times I can't get pulled up the first time. So I have to chain up to pull ahead ten feet. Then maybe just take them back off. The trouble is the truck will still be at 60,000 lbs when you need to do that first pull up. Not many tractors will help you much.
I rarely have to chain up other than in the barn yards. It just is cheaper to chain up than have to call a wrecker.