It's odd to say that the only company you had a direct business relationship with had nothing to do with it. Product liability does apply to the seller of that product, in addition to the manufacturer and distributor. That doesn't mean retailers won't fight it, or that it is easy to prove. It's just how the laws are in the US.
If I drink a coca-cola and it turns out it had rat poison in it, I'd likely blame coke, and not the grocery store, even though I have no direct business relationship with coke.
