It's not that. More likely that they get more money off of Galaxies' latest expansion pack, or the much-rumored KotOR III. Or off of BF II. They don't care about who plays their games. It's all $$$ to them. Follow the money... JK series isn't making as much moolah as they'd like. I do some minor businesswork, and I have seen ideas that lasted for a long time dropped because they don't make money.
It's sad, but probably true. But hey, we have teams and teams of modders, don't we?