They aren't allowed to distribute it. This is just residual.
That's not how licensing works.
You think EA had another licencse for publishing/distributing RotWK on Origin? I don't think so. It certainly applied to all the games, in every form (disc-based and digital). The problem is, while EA might be allowed to upload BFME2 to Origin, they wouldn't be allowed to charge for it without striking a deal with WB.
For us players that's a real shame because the only game needing a disc/image now is BFME2.