If you buy a NES and super Mario bros. there is no guarantee you will EVER make it to the end of stage one. You have the potential to, but there is nothing saying you will. In destiny, same thing. If you have skill and team mates you can see everything in the game (DLCs are a diff story) If you play long enough, and well enough ; you will probably get all the exotics. Outside of this, there remains no guarantees And that's fine with me :)