That's what insurance is for ~ plus it's clearly the fault of your sender for not having followed the guidelines and rules for correct packaging of breakables ~ they're published in the Domestic Mail Manual although UPS and FedEx also provide guides regarding how to properly package all sorts of things.
Their insurance is automatic ~ as is their price ~ it's automatically higher unless you are a very large shipper then they can cut you some deals on volume.
The common carrier is never guilty ~ anywhere.
"...plus it's clearly the fault of your sender for not having followed the guidelines and rules for correct packaging of breakables..." Heh, I know you are trying to be informative, but I have to wonder what kind of reinforced kevlar box would have been necessary to prevent my package from being crushed by whatever process brought enough force to bear on that box.