I saw a history channel the universe episode about what if the moon disappeared. Tidal waves, ocean life extinction, pitch black nights, crazy change in seasons due to uncontrollable axis. What if we never had moon: 8 hour days, extreme storms, short stubby plant life, short armored animals, no humans, no plate tectonics, shorter lived magma core, mars like planet, almost no continents, changing seasons, etc.
They would be stupid to destroy the moon, it would endanger all life forms on earth.