That incident was a brazen act of stupidity coming from those criminals who thought they can escape the teeth of law. Meanwhile, I think the buyer company has been complacent enough that they did little to ensure that the copper cargo would be accompanied by their own representative and the insurance papers verified for their veracity considering that the transaction involves a considerable amount of money. Imho.
I am pretty sure that the company don't mind that their precious metals were stolen because as far as I know, those are insured in a way or that they can easily be recovered from the thieves, not to mention that those stolen coppers are going to have a hard time being sold in the market because it is tainted and the only way for it to be sold is when they don't sell it publicly which is the likely thing to happen.