Why does Simon ask “What else is there to do?” in Chapter 8 of Lord of the Flies?

After Jack's bid to take over Ralph's position as chief
fails, Jack leaves the group and invites others to join him.  Ralph, Piggy, and Simon
are wondering what to do next.  Simon stands up, takes the conch, and suggests that they
climb the mountain in search of the beast that Ralph and Jack say they spotted.  The
others at the assembly are too afraid of the beast to want to explore the mountain.
 Piggy wonders what good would it do to climb the mountain to see the beast when even
Jack and Ralph were defenseless against it.  Simon insists that there is nothing else to
be done: "What else is there to do?"  They should go look for the beast that terrified
Ralph and Jack on their expedition.

Simon, of course, is
right.  The boys need to confront their fears. On the expedition, Ralph and Jack were so
afraid of the idea of a beastie that they did not investigate what they thought was a
beast. Instead they panicked and ran.  If they had looked closely, they would have known
that the beast was harmless--a dead body attached to a parachute, not some man-eating
monster that could destroy them.  As long as the boys do not confront their fears, the
more easily they are controlled by Jack, the less civilized they become, the more
violent they become.  As usual, though, the boys--even Ralph and Piggy--do not listen to
Simon, and instead turn their attention to creating a rescue
fire.