Bioware let Obsidian have KotOR 2 simply because BIO is more interested in making it's own IPs succesful, now that they have been succesful with D&D (several times) and with Star Wars.
I'm not sure what you're trying to imply with your wording, but this is hardly a case of the BIO CEOs coming before Fergie, bowing and presenting KotOR2 on a silver plate.
They could have picked any company to do this game... but they CHOSE Obsidian to do it.