A later tunnel, built by King Hezekiah in 701 b.c. , from inside the city walls to to the hidden Gihon Spring in the valley outside the walls allowed Jerusalem to survive the onslaught of Assyrian armies that had already destroyed the northern Kingdom of Israel and swept its ten tribes from the annals of history.
A tunnel helped Jerusalem survive invading Assyrian armies.
Members were not concerned that they might be held liable if other members took their advice but did not go as expected.