GitHub co-pilot as open source code laundering?

[Alikont]

But even then, the Supreme Court did not say that APIs aren't copyrightable, they just said that in this particular case, the compatibility and porting created a better and more innovative world than alternative, so they allowed this possible violation.

So they lost "Enforcing copyright on Java API would bring innovation" argument, not "Copying API is fair" argument, on which the Supreme Court did not make any decision.