Sort of? You could appeal to the Ethereum developers, they could reasonably recover these funds without upsetting anyone too much by just refunding all WETH transactions sent to that contract. (This is the root of the spiritual disagreement between Ethereum and Ethereum Classic)

Of course you’re more likely to succeed when it’s real money and the other party has to worry about getting sued.

But even in the case of a bank transfer, the other party can abscond with your money and it’ll be extremely hard to recover since law enforcement probably won’t help you and (especially international) litigation costs can quickly render such an endeavor far too expensive.