No, it's just the fact that the harpoon would have to spin around the ring to be secure enough for you to fall.
It would mean you have to lose the harpoon.
...Alternatively, shoot the harpoon through, hold the harpoon and the whaling pistol, and sort of pulley yourself down.
So either method you take it doesn't matter. :I
This whole arguement is invalid, you use the harpoon gun in some way, you don't break it, and you get down.