Plants are fueled by energy, which the leaves and sometimes other green tissues provide. The energy isn't distributed evenly throughout the plant. Energy 'sinks' are plant parts that call for energy. The most powerful sinks are flowers, fruit, leaves, stems, then roots. Like animals, the fundamental purpose for being is to pass their genes along; so it's not a surprise that the plant is genetically programmed to allocate the greatest amount of energy to the inflorescence, which in figs is both flower and fruit. This is especially true when other factors that stress the plant are in play. You might think of it as added stress causing the plant to "feel" it's threatened, and that as its last act it needs to make sure it fulfills it's reason for being, so it funnels a maximum amount of energy into producing fruit. If you remove the inflorescence/fruit, the next most powerful sink would be foliage.
Al