All that you have said is true Dumbledore's hand was burnt in the process of destroying a Horcrux. It will take a lot of power to destroy the others. Do you think that Ron and Hermione will help Harry like he helped Dumbledore in the cave. Maybe they will take the brunt of the curses that are on the Horcruxes so that Harry will be at top strength when faced Voldemort. What do you think will happen with the Horcruxes? Do you think that R.A.B. got to more than just the one in the cave?