No, it is a sidestep. Even if the code is copyrightable, it doesn't matter. The majority decided it was better to make a case for fair use than for the uncopyrightability of APIs. That's all.

My understanding is that the original problem was that there is nothing in law that makes a difference between actual implementation code and API. Otherwise it would have been a trivial case.

And even in this, they rather go with the easier fair use claim that is case-by-case.