The real question is why we would even need to use our lungs and move air in order to produce complex sound. The speakers in your car are not hooked up to an air compressor, are they? Why does speech even need to come through our mouths? Surely an intelligent designer who is supposedly all knowing and all powerful could have come up with an infinite number of better designs.
It is only our bias towards evolution that makes one solution realistic and another not realistic. For an all knowing and all powerful deity, what design would not be realistic?