Existing discussion about total energy consumption by civilizations (such as the one summarized in Kardashev scale) neglects the accident and terror factor.
Disasters (both natural and man-made) are usually associated with uncontrolled release of energy. When a civilization deals with little energy, the scope of man-made disasters is limited. However, when a civilization has a higher Kardashev scale rating, it deals with a lot of energy. Then uncontrolled energy releases can wreak a lot of havoc. Example: meltdowns in nuclear reactors.
Traditionally, the way to mitigate against man-made disasters was to live away from dangerous locations. Dangerous locations are locations, in which a lot of energy is manipulated. However, once a civilization advances to type I or even type II, then it will be at its disposal enough energy to wreck an entire planet. Humans would have to live in far away space stations, and in those space stations use much less energy than is available to their civilization.
Therefore, development of force fields able to contain such explosions is critical to humanity survival as it strives to become a type I civilization. This is important not only because of the risk of accidents, but also because of terror acts.