Why not? It is free research and development after all

I have no idea why APPLE does not embrace Jailbreaking considering how much it really does help them. But then again that's like asking why Marijuana is still illegal when it actively halts so many illnesses and life altering diseases.
Makes no logical sense on either front if you ask me. I thought APPLE was pro open source and all about community?
Ironically enough, how wrong is it to take a Open Source Platform such as FREE BSD and close it completely down>? Still trying to figure out how they have not been sued or challenged in court on that one for many years now.