They would be, but it's also unlikely you would be able to write something useful using only the id and value such that you might confuse something.

There's some "self-limiting" - the smaller the interface, the more likely you get accidental implementation, but also the less likely you are to confuse them in a way that typechecks but actually does something unexpected.

A practical example might be io.Closer - I am certain I implemented this in a dozen types I never intend to pass to any io functions. But no io functions actually take just a Closer, and if I did write some generic cleanup routine that only requires a Closer, it's probably fine and maybe even good if it works on byte IO and gRPC connections and Kafka streams. (Especially without generics, it might be the best I can do.)