"Does it even matter whether bin Laden is found?"

from CNN:

Yes, it does. First, there is the matter of justice for the almost 3,000 people who died in the September 11 attacks and for the thousands of other victims of al Qaeda's attacks around the world.

Second, every day that bin Laden remains at liberty is a propaganda victory for al Qaeda.

Third, although bin Laden and his deputy Ayman al-Zawahiri aren't managing al Qaeda's operations on a daily basis they guide the overall direction of the jihadist movement around the world, even while they are in hiding.