Okay, so the Harlem Shake isn't for everyone.

But--serious question--how is it that they devs coding Cydia can crack closed source iOS and do whatever they want? Can our devs crack Harmattan like this?

I always hear that this part or that part of Harmattan is closed source, and this is offered as an explanation as to why something can't be done. What gives? Is Harmattan really tougher to crack than iOS?